254 PHLEBOTOMID.E. 



The genera may be grouped thus : 



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

 b b. Proboscis with broad pouting liplets. Maxilla 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 tips. Eyes rounded, distant in front. 

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

 tenna? with obconical joints, twelve-jointed.) 4. TRICHOMYIA. 

 b b. Hindermost vein abbreviated. (Antennas with linear joints, 



fifteen-jointed?) 5. SYCORAX. 



Obs. Eabricius has observed the maxillae. The dissections in 

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

 ricoma canescens. 



Genus I. PSYCHODA. 



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



Mcq. ; Curt. ; Hal. ; Westvv. ; Zett. ; lloss. (V.) Ttnearia, Schell. 



Tipulay.,Ij.', D. G. ; Retz. ; Mull.; Ross.; F. E. S. ; Scop.; Schr. 



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

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



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



articulati, exserti, incurvi, pubescentes ; articuli ajquales. Antenna 



circiter 12-16-articulatse, porrecta3, verticillatim pilosaa, moniliformes, 



thorace paullo longiores; articuli primus et secundus crassiores. 



Thorax rotundatus. Ala3 obovataa, latas, deflexaa, valde hirsute; 



venulse transverse nulhe. Abdomen cylindricum, segmentis octo. 



Pedes breves, inermes, crassiusculi ; tibia? apice non calcarata?. 



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

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



