THERE VA. 



reva), Lch. Bombyliarii et Xylotoma, Mg. ; Mq. d. e. ; Ags. ; Lw. 

 Bombylica, Brm. Bom&yKites, Anthracites, et Therevites, Nwm. 

 Bombylid(K y Anthracidte, et TkerevidtK, Ct. ; Wtw. Bombyliarii, 

 Anthrarii, et Xylotomee, Mq. d. Hornbyl'infc, Anthraciiifp., et There- 

 mnce, Edn. 



t'aput rotundatum aut subtransversum. Frons et vertex 11011 impressa. 



Antennae 4-articulatic ; articulus quartus apicalis. Alse divaricates. 



Pedes tenues. 



Body hairy, rather narrow, of moderate breadth, or broad. Head 

 subtrausverse or rounded. ( ro\\ n and front not impressed. Ocelli 3. 

 Antenna' .'3- or 4 -jointed ; fourth joint apical, very short. Wings half- 

 dcllcxcd. Haltcrc.s uncovered. Abdomen with 7 segments. Legs 

 slender. The genera may be thus divided : 



( of moderate length 

 Wings ( short -. 



I 



long: Proboscis 



remote 



Antennae at the base< 



approximate 



long : f long . 



First joint of the antennse< 



i. short . 



1. THEREVA. 



2. ANTHRAX. 



3. LOMATIA. 



4. BOMBYLIUS. 



5. PHTHIRIA. 



Genus I. THEREVA. 



THEREVA, LI. g. c. iv. (1809) ; Mi^. ; Mq. ; Ztt. ; Lw. Musca p., L. ; 

 Gm. Nemotelus p., Dg. Tabanus p. ? Gf. Bibio p., Fb. ; Mg. 

 kl. ; Fin. ; Pz. Mydas p., Lm. 



Corpus majoris vel mediae magnitudinis, cylindrico-conicum, sat angus- 

 tum, villosum. Color cinerascens, obscurus, pictura abdominis fas- 

 ciata. Caput subtransversum. Oculi nudi, virescentes, unicolores. 

 Ocelli 3. Proboscis occulta. Antennae porrectae, 5-articulatae, basi 

 approximatae. Alee mediocre^, semideflexcc. Abdomen obconicum. 

 Mas. Oculi contigui. 

 Fcem. Oculi remoti. 



Body cylindric-conical, of moderate or rather large size, clothed with 

 brown, tawny, or white hairs. Eyes green. Ocelli 3, on the crown. 

 Proboscis withdrawn into the peristoma when at rest. Labrum small, 

 flat, as long as the labium. Lingua small, acute, channelled above. 

 Maxillae small, acute, somewhat shorter than the labrum. Palpi cy- 

 lindrical, one-jointed, hairy on the outside, with a knob at the tip, 

 somewhat longer than the labrum. Labium tumid beneath, chan- 

 nelled above. Antennae 5 -jointed, porrect, as long as the head, 

 VOL. i. L 



