254 PHLEBOTOMID^. 



The genera may be grouped thus : — 

 a. The two forked veins (radial and externo-medial) having hetween them 

 two simple veins (a double cubital). (Eyes lunate, approximate in 

 front. Mediastinal vein faintly connected with the subcostal not far 

 from the base of the wing, and then vanishing, or prolonged faintly 

 and gradually converging to the costal. Female with a slender, 

 pointed, ascending borer.) 



b. Proboscis compressed, with maxillae nearly as long. Wing pointed 

 exactly at the end of the second simple vein. Larva pale, terres- 

 trial; the last segment slender, much elongated. 1. Psychoda. 

 h h. Proboscis with broad pouting liplets. Maxillae obsolete. La- 

 brum shorter than the labium. Larva blackish ; last segment little 

 elongated, jagged at the end, and ciliated with radiating hairs. 

 c. Wings broad, ovate, with an upward bellying sinus in the mid- 

 dle (distorting the two intermediate simple veins) in the male. 

 Larva with two double rows of lanceolate (gill-like) plates down 

 the back. 3. Ulomyia. 

 c c. Wings even in the male and in the female. Larva with two 

 bands of curved hairs down the back. 2. Pericoma. 

 a a. The two forked veins having between them one simple vein (cubi- 

 tal). Mediastinal vein bent back to join the costal opposite its 

 connection with the subcostal. Brachial areolets distinctly closed. 

 Wings rounded at the tijjs. Eyes rounded, distant in front. 

 h. Hindmost vein (subanal?) not much shorter than the rest. (An- 

 tennae with obconical joints, twelve-jointed.) 4. Trichomyia. 

 h h. Hindermost vein abbreviated. (Antennae with linear joints, 



fifteen-jointed?) 5. Sycorax. 

 Ohs. Fabricias has observed the maxillse. The dissections in 

 Curtis's Brit. Ent. 745 are from a Pericoma, the wing that of Pe- 

 ricoma cauesceris. 



Genus L PSYCHODA. 



Psychoda, Latr. Diet. H. N. xxiv. 189. 518 (1796) ; F. S. A. ; Mcig. ; 



Mcq. ; Curt. ; Hal. ; Westw. ; Zett. ; lloss. (V.) T'mearia, Schell. 



Tipula^.,L.; D. G. ; Eetz. ; Mull.; Ross.; F. E. S. ; Scop.; Schr. 



Bibio p., Geoff. ; Mull. Trichoptera, Meig. Kl. 

 Corpus oblongo-ovatum, parvum aut minimum, undique dense villosum. 



Caput mhuitum, sessile. Oculi lunati. Proboscis brevis. Palpi 4- 



articulati, exserti, incurvi, pubesccntes ; articuli acquales. Antennae 



circiter 12-16-articulatae, porrectac, verticillatim pilosae, monUiformes, 



thorace paullo longiores ; articuli primus et secundus crassiorcs. 



Tliorax rotundatus. Ake obovat;c, lat;e, deflexae, valde liirsut;c ; 



venuhe transversa nullae. Abdomen cylindricum, segmentis octo. 



Pedes l)reves, inermcs, crassiusculi ; tibia; apice non calcaratae. 



Eody oblong-oval, snudl or very small, wholly and thickly villose. 

 Head snudl, sessile. Eyes lunate. Proboscis short, compressed. Man- 



