Males of C. enigma gen. et sp. n. are rather small in size (Table 1). The basic colour of the body is bright orange (Fig. 1A). The head is slightly longer than wide, and appears roundly rectangular in dorsal view. Its dorsal and lateral surface is dark bluish-green (Fig. 1A). The gena is about one and a half times broader than the greatest diameter of the compound eye. The antenna is plain orange, fairly filiform, and if extended posteriorly reaches to the centre of abdominal tergum V. The scape is rather rectangular, one and a half times longer than wide, and appears oval in cross-section. The pedicel is cylindrical, slightly longer than wide, and much shorter than scape. The first flagellomere is about one and a half times longer than the pedicel. The compound eye is dark brown, circular, and protrudes hemispherically (Fig. 1A). The ventral surface of the head is mainly black. The pentamerous maxillary palpus has the palpomeres slightly flattened dorsoventrally (Fig. 2A). The galealobulus is rather elongated, with a slender and acutely pointed apex (Figs. 2A, B). The distal portion of the galea is broadly rounded, and distinctly extends beyond the lacinia (Fig. 2A). The area of medially-directed trichomes of the galea is located laterally (Fig. 2A), and consists of a prominent band of strongly flattened trichomes (Fig. 2C). Adjacent to this area, a narrow strip consisting of short cylindrical bristles is present (Fig. 2C). The lacinia features three distal teeth (Figs. 2A, D). The palpomeres of the trimerous labial palpus are similar to those of the maxillary palpus.

The prothorax (Figs. 1A, B) is shorter than the head, and slightly widens towards the posterior end. The pronotum is dark greenish-orange, flat, with a faint cross-shaped incision in the center. The front margin of the pronotum is concave, and features a prominent semicircular glandular area at each anterolateral corner. The hind margin of the pronotum is orange and straight. The prothoracic coxopleurite is dark bluish-green and almost bell-shaped. The prothoracic sternum is evenly dark orange. The mesothorax is moderately elongated (Table 1), rectangular, and indistinctly widens from the anterior to the posterior end (Figs. 1A, B). The mesonotum is about twice as long as wide, with a median black triangle-shaped mark. The mesothoracic episternum is narrow and almost as long as the mesonotum, whilst the epimeron is very short and somewhat semicircular; the two sclerites are mainly mid orange, and the pleural suture is discernible. The mesothoracic sternum is slightly widened posteriorly, with the basisternite much longer than the furcasternite. The metathorax and the first abdominal segment are fused. The resulting segment is shorther than the mesothorax, of about the same width. The metanotum is short (Fig. 1D), only one quarter the length of the mesonotum, and approximately four times wider than long. Its colour pattern is similar to that of the mesonotum. The metathoracic episternum is broad and rather rectangular; the epimeron is small and narrow. The metathoracic sternum has the basisternite and the furcasternite of equal length. On the mesothorax no tegmina is present. On the metathorax a tiny lateral flattened lobe is visible (Fig. 1D), which likely represents a residual hind wing pad.

Legs (Figs. 1A, B) are mainly dark bluish-green, robust and quite short. The hind leg moderately projects beyond the abdominal tergum VII (Fig. 1B). Coxae are mid orange dorsally, and vivid black ventrally. Trochanters are short and fused to femora. Femora have a stout structure. They have unarmed dorsal and medio-ventral carinae. The ventro-anterior and ventroposterior carinae bear up to six distal spines, which are more distinctly developed on the hind femora. The hind femur reaches at best the center of the fourth abdominal tergum (Fig. 1B). Tibiae are unarmed. The tarsus is less than half the length of the corresponding tibia. Tarsomeres I–IV feature a nail-shaped euplantula on their ventral surface (Fig. 2E), which is equipped with few short bristles on the proximal half (Figs. 2F, G). The cuticle of these euplantulae has a nubby surface (Fig. 2F) and at high magnification appears densely covered with minute processes or nubs (Fig. 2G). The pretarsus is characterized by the presence of an elongated smooth euplantula, simple pretarsal claws, and a pan-shaped distal arolium (Fig. 2E).

The abdomen (Figs. 1A, B) is about one and a half times longer than the head and thorax combined, and very moderately narrows from the anterior to the posterior end. Abdominal terga display a black median triangle-shaped marking. The first abdominal tergum is twice as long as the metanotum; the boundary between these two terga is very faintly delimited (Fig. 1D). Abdominal segments II–VII are oval in cross-section. Abdominal terga II–VII are quadrate; terga VIII–X are slightly broader than long. Abdominal sterna I–VIII are bright orange and smooth. The tergum X (or anal segment) is slightly longer than tergum IX. In dorsal view, the posterior half of tergum X shows a longitudinal median carina (Fig. 3A). The hind margin of tergum X is thickened, with a small median indention. Ventrally (Fig. 3B), the hind margin is armed with about 30 black toothlike projections. The vomer is roughly triangular, with an elongated and upcurving pointed apex. Paraprocts are clove-shaped. The epiproct is very small, and does not extend beyond the hind margin of tergum X. The cercus is straight, moderately flattened, and appears oval in cross-section. It is about half the length of tergum X. Its width slightly narrows from base to apex, with a blunt distal tip which projects over the posterior margin of the anal segment. The sternum IX (or male subgenital plate) is rather flat, only slightly longer than sternum VIII, and does not extend over tergum IX (Fig. 3B). The lateral margins of the poculum are parallel-sided in the anterior half; they then taper to a rounded posterior end, which has a small median notch (Fig. 3B).

Females are larger and broader than males (Fig. 1C, Table 1), and differ in the following morphological features: The basic colour of the body is bright olive green. Black markings on the thorax and abdomen are weakly developed and can even be absent (Fig. 1C). The pronotum is much darker green. The mesothorax is distinctly broadened medioposteriorly (Fig. 1C). The mesonotum is one and a half times longer than wide. Spines of the ventral femoral carinae are less distinct, and can also be absent. The hind femur reaches to the anterior margin of the fifth abdominal tergum. The hind leg hardly projects over the abdominal tergum X. Abdominal segments IV and V are distinctly broadened, whilst segments VI–IX are increasingly narrowed. Abdominal terga II–VIII are broader than long, whereas the tergum IX is almost quadrate. The tergum X is longer than tergum IX. It is characterized by the noticeable elongation of its posterior margin, which regularly tapers to a medially notched tip (Fig. 3C). The cercus is more distinctly triangular, about one quarter the length of tergum X, and features a pointed tip. The sternum VIII is spoon-shaped (Fig. 3D). It has a blunt longitudinal median keel and a sharply rounded hind margin.

The external chorion of C. enigma gen. et sp. n. is plain mid to dark brown in colour. In lateral aspect the egg has a nearly spherical shape (Fig. 1E), with a length of 3.8–3.9 mm, and a height of 3.3–3.4 mm. Both in dorsal and ventral aspect, the capsule appears decidedly oval (Fig. 1F), with a width of 2.8–2.9 mm. The operculum, located at the anterior pole, is oval and very moderately convex. Externally, it is equipped with an undetachable cylindrical capitulum (Figs. 1E, F). The opercular angle is almost zero. The whole external surface of the capsule is covered with small rounded granules. The dorsal surface of the capsule appears slightly acutely-shaped medially (Fig. 1E). It features the micropylar plate in the basal two thirds, extending for a length of 1.7–1.9 mm. The micropylar plate is longer than wide, and externally is delimited from the remainder of the capsule by a faint dark brown rim. Usually this specialized region of the eggshell is distinctly heart-shaped (Fig. 1F), but in certain eggs it appears from oval to nearly round. The micropylar cup is located at the posterior margin of the plate, in a median position (Fig. 1F). The median line is not present. The ventral surface of the capsule is regularly rounded (Fig. 1E). The posterior pole is simple.