153. 

 DASYPOGON BREVIROSTRIS. 



Order Diptera. Fam. Asilidse Lat. Leach. 



Type of the Genus Asilus Diadema Fah. 



Dasypogon Meig., Lat., Fab., Leach — Asilus Linn., Fah., Panz. — 

 Erax Scop. 



AntenncB contiguous, porrected, inserted in the middle of the 

 face, not longer than the head, 5 -jointed, basal and 2nd joints 

 of equal size, subovate, pilose, 3rd joint long pubescent, atte- 

 nuated, 4th small, 5th rather long, slender and terminated by a 

 transparent bristle (fig. 3). 

 Lahnim very short, broad, acuminated (lb). 

 Tongne long horny acute, very hairy on the upper side (c). 

 Mandibles none. 



Maxillce long linear, submembranous towards the apex (e). 

 Palpi short, cylindric, 2-jointed, covered vrith woolly hair (0. 

 Lip large, very horny, hairy, hollow, open and narrowed at the 

 base (g). 

 Head transverse, very short, attached by a distinct neck. Proboscis 

 exserted obliquely, as long as the head. Clypeus convex bearded. 

 Eyes remote in both sexes. Ocelli 3 in triangle (2, the head in pro- 

 file). Thorax gibbous. Scutellum rounded. Abdomen cylindric- 

 conic, shorter than the wings, more slender in the male. Wings in. 

 cumbent, containing about 15 cells, with 5 perfect upon the posterior 

 margin, \st costal cell extending only to the middle. Halteres naked, 

 trigonate. Legs rather robust. Tibiae straight simple. Tarsi 5- 

 jointed hairy, basal joint the longest. Claws distinct. Pulvilli 2, 

 with a bristle arising from the centre at the base. 

 Obs. The dissections were made from D. brevirostris. 



Bkevirostris Meig. Syst. Besch. v. 2. p. 2/3. n. 24.— fern. D. armil- 

 latus Fall. — male D. longitarsis Fall. 



Male. Black, shining, minutely punctured, covered with yel- 

 lowish hair. Hair on the clypeus ochraceous. Thorax with the 

 hair long and fine. Abdomen cinereous black, covered with 

 short pubescence, rather longer at the base. Wings hyaline, 

 iridescent, fuscous at the apex, nurvures piceous. Halteres with 

 the club yellowish. Anterior tibiae rufous at their insertion, mid- 

 dle and posterior rufous, black at their apex, the latter robust, 

 narrowed at the base : posterior tarsi very slender, the basal 

 joint very long, the remainder very short (fig. Sf). 

 Female. Larger, pubescence rather aureous. Wings yellowish 

 towards their base, not fuscous at the apex. Posterior tibiae 

 robust, but not suddenly incrassated ; posterior tarsi scarcely 

 longer than the others, but more robust. 



In the Author's and other Cabinets. 



