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Genus 2. — Lycog aster, Sluiehard. 

 Type. Lye. i)idlatusj Sbk. 



Head large, square above and somewhat flattened; eyes lateral, pro- 

 minent, ovate, ocelli placed in an obtuse triangle. Antennae inserted 

 near the middle of the face, setaceous, gradually tapering to the slen- 

 der extremity, with twenty-four joints, the scape the 

 most robust, the second small, the third rather longer 

 than the scape, the remainder gradually decreasing 

 in length. Clypeus slightly emarginate. Mandibles '^^^^zzy^ 

 tridentate, the teeth subequal, the external being the 

 largest. Max. palpi filiform, longer than the labial, 6-jointed, the 

 three first rather robust, the second longer than the preceding, the third 

 subobconic, short, the following slender and subequal, the fourth the 

 longest and as long as the second. Labial palpi with the first joint 

 short, the second the longest, subobconic, the third and fourth subse- 

 curiform. Head attached by a short neck to the pro thorax. The 

 thorax oval, prothorax short, but embracing it laterally as far as the 

 insertion of the superior wings ; mesothorax with tlu'ee longitudinal 

 furrows, the external ones slightly curving ; scutellum broad, quad- 

 rate, divided by a channel in the centre ; metathorax rounded, obtuse, 

 with a slight fiirrow down the middle. Superior wings with one mar- 

 ginal and four submarginal cells, the first and fourth largest, the latter 

 extending to the apex, the second triangular, the transverse separating 

 nervure curving into the first, the second receives the first recurrent at 

 its commencement, the third cell nearly square, and receiving the se- 

 cond recun-ent in its centre. Legs slender; two calcaria to the four 

 posterior tibiae : tarsi having their terminal claws bifid. Abdomen in- 

 serted upon a projection of the metathorax, extending beyond the 

 posterior coxae, elhptical, much narrowed at both extremities, with 

 seven apparent segments, and curving downwards from its third ; the 

 first short and small, the second very large, broad and subdepressed 

 above, but the ventral portion projecting backwards in a spine, the 

 remainder decreasing in length and width, the terminal one with two 

 acute longitudinal carinae, between which there is a deep channel, and 

 recurving to meet the ventral projection of the second. Ovipositor 

 not exposed. The cut exhibits the abdomen in profile. 



This genus is named from twhoi; a hook, and yaarri^ the belly, in allu- 

 sion to the projection of the second ventral segment. It is to be ob- 

 served that the projection of the metathorax upon which the abdomen 

 is inserted, is greater here than in the preceding genus, whence the 

 affinitv with Auhicus is closer. 



