LIST OF DIPTEEA. 683 



Forceps analis mediocris, margine postico inciso. Foem. — Ovi- 

 ductus obconicus. 



Echthistus, Loeiv, Linn. Ent. iv. 142. 



Grayish yellow species of rather large size. Face broad ; the 

 convex part large. Mystax thick. Anterior femora thickly spi- 

 nose ; anterior metatarsi very short, hut little longer than the 

 second joint, a character peculiar to this group. Male. — Anal for- 

 ceps of moderate size ; hind border notched. Fern. — Oviduct 

 obconical. 



72. AsiLUS RUFINERVIS. 



Fulveseens ; fades ferruginea ; mystax supra niger, subtus albus ; 

 barba alba ; thorax fusco triviitatus ; abdomen maculis dor- 

 salibus fuscis ; seta thoracis abdominisque minus validce ; 

 pedes fulvi, femoribus nigris ; aim antice Jlavescentes, venis 

 fulvescentibus ; halter es fiavi. 



Asilus rufinervis, ffojf'm. ; Meig. Zweifl. ii. 324, 27, ex parte. 



Ruthe, his, 1831, 1219. Zeller, Isis, 1840, 49, 2. Loew, 



Isis, 1840,538, 2. 

 Asilus flavescens ? Macq Hist. Nat. Dipt. i. 305, 8. 



Middle Europe. 



73. Asilus cognatus. 



Setae thoracis abdominisque validiores ; tibia? rufce, apice nigra: ; 

 tarsi nigricantes, basi magis minusve rufescentes. 



Asilus rufinervis, Meig. Zweifl. ii. 324, 27, ex parte. 

 Asilus cognatus, Loew, Linn. Ent. iv. 143, 73. 



South Russia. Isles of Greece, Asia Minor. 



Group 16. Philonicus. 



Corpus mediocre, cinereum, fere nudum. Faciei pars convexa 

 parva. Mystax parvus. Metatarsi non abbreviati. Mas. — For- 

 ceps analis vix media? magnitudinis, margine postico arcuatim 

 inciso. Fain. — Oviductus obconicus, apice spiuosus. 



Philonicus, Loew, Linn. Ent. iv. 144. 



Allied to Proctaeanthus. Body gray, almost bare, of moderate 

 size. Face with the convex part small. Mystax with but few 

 bristles. Metatarsi not short. Male. — Anal forceps rather less 

 than the middle size, with a concave notch on the hind border. 

 Fern. — Oviduct obconical ; its tip armed with short spines. 



