Lonchopteridae. 7 



obconical, second somewhat cyathiforme, the third semiglobular or 

 nearly globular, bearing a long, subapical, three-jointed arista with the 

 basal joints short^; the arista is inserted somewhat outwards on the 

 third joint; (when the antennæ are exsiccated the third joint is con- 

 tracted and more disciforme); the first and second antennal joints 

 have bristles at the apical margin, the third and the arista are short- 

 pubescent, almost microscopically. Epistoma broad, as broad as the 

 frons, but low. Jowls small, a little descending. The oral aperture 

 large, circular. Oral cone developed, but proboscis short, slightly pro- 

 truding. Clypeus incised in the anterior end, somewhat horse-shoe- 

 shaped. Labrum short, semitubular, triangular and pointed; hypo- 

 pharynx very small, much shorter than labrum, spindle-shaped and 

 broadly cut at the end; maxillæ with a short and thin, pointed 

 lacinia, about as long as hypopharynx; the palpi relatively large, more 

 than twice as long as the lacinia, club-shaped, hairy and beset with 

 short bristles. Labium with the basal part slightly chitinized, rather 

 slender and not so long as the relatively large and broad labella, 

 which are rounded at the base, but triangular outwards, and thus 

 triangularly oval in shape. Thorax rectangular, a little arched above; 

 pro- and metathorax very small; of bristles there are a humeral, 

 two posthumeral, two notopleural^, two supraalar and a postalar 

 bristle; further three dorsocentral bristles, and behind each row of 

 them a very small bristle, so that there are two small præscutellar 

 bristles or hairs; there is also generally a small hair in front of 

 the first dorsocentral bristle, and a small bristle quite in front on 

 each side; otherwise thorax is bare; scutellum rounded triangular 

 with two apical bristles. Pleura without bristles or hairs. Abdomen 

 a little elongated, not broader than thorax, nearly parallel-sided or a 

 little narrowing behind; it is somewhat tlattened; the first segment is 

 of a considerable length. In the male there are five visible, not trans- 

 formed segments, the second and third short, equal in length, the 

 fourth longer and the fifth still longer, sometimes rather much longer; 

 at the end of the fifth segment the hypopygium is seen ; the same is larger 

 or smaller but always rather large, bent in under the venter; the two 

 pairs of inner lamellæ or gonapophyses are more or less styliform or 

 blade-shaped, with various dilatations or spines; the outer lamellæ 

 are somewhat scale-like, shorter or longer, with bristles at the margin. 



1 WandoUeck (Zool. Jahrbuch. Abth. fur Syst. VIII, 1895, 785) says that the arista 

 is two-jointed and the antennæ five-jointed, but this is erroneous. 



* De Meijere says one notopleural and one præsutural; perhaps he takes some of 

 my notopleural as posthumeral and the inner posthumeral as præsutural; this 

 latter might perhaps be correct. 



