(ORTHORRHAPHA BRACHYCERA.) 



AGROPTERA. 

 Lonchopteridae. 



Head a little broader than thorax, of transverse shape. Eyes 

 broadly separated and equally separated in both sexes; vertex and 

 frons broad; three ocelli. There are two pairs of fronto-orbital bristles, 

 one approximated pair below, above the antennæ, and one distant 

 pair above; two oceliar bristles; four vertical bristles just above, and 

 a little downwards on occiput a pair of smaller, a little converging 

 postvertical bristles; along the eye-niargins a row of postocular bristles, 

 and along the oral margin on each side a row of six to seven oral 

 bristles, the anterior pair crossing. Eyes not large but prominent, 

 bare. Antennæ short, six-jointed, third joint somewhat semiglobular 

 or alniost globular with a subapical, three-jointed arista, the basal 

 joints of which are short; the two first antennal joints with small 

 bristles, the third and the arista short-pubescent. Epistoma broad, 

 rather low. Oral aperture circular. An oral cone developed, with the 

 horse-shoe-shaped clypeus on the front side. Proboscis short ; the mouth 

 parts consisting of a triangular, semitubular labrum, a short, spindle- 

 shaped, truncate hypopharynx, and maxillæ with a small, short, pointed 

 lacinia and relatively long, one-jointed, club-shaped palpi. Thorax 

 reetangular; pro- and metathorax small, no chitinized metasternum 

 behind the hind coxæ. There are humeral, posthumeral, notopleural, 

 supraalar and postalar bristles, and on the disc dorsocentral bristles, 

 of which those of the posterior pair are very small, so that there are 

 two small præscutellar hairs; for the rest thorax and pleura bare. 

 Scutellum with two apical bristles. Abdomen with the first segment 

 long; in the male there are five visible, not transformed segments, the 

 fourth longer than the preceding, the fifth still longer, sometimes rather 

 long; after the fifth follows the hypopygium; it is large, more or 

 less reetangular, bent in under the venter; the side-margins are curved 

 down and refolded on the ventral side, and on its basal part the 

 hypopygium is roofed over; thus a ventral cavity is formed; from the 



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