254 WALKER ON 



Genus IV.— Themira, R. Desvoidy. 



Musca . . . Linn. List. Goecl. Mcrian, Frisch. Berk. 



Scojj. Gmel. Fabr. Schrank. 

 Sepsis . . . Fallen, Meigen, Curtis, Haliday. 



Seta minime pilosa, distincte triarticulata : metathoracis scutellum 

 bene determinatum : abdomen sessile, depressum ; maris fere 

 lineare, apice plerumque setosum, segmento 1°. elongato ; fern. 

 elongato-ovatum, segmentis subasquis : pedes elongati, graciles, 

 maris femoribus tibiisque anticis subtus dentatis et spinosis. 



Sp. 1. Them, putris. Mas et fem. Atra aut nigro-anea, 

 tiitida, abdomine maris apice breve setoso, alis subhyalinis 

 aid subfuscis. 



Musca putris. Linn. Syst. Nat. 2. 993. 89. 



Var. fimeti . Faun. Suec. 1. 1110. 2. 1850. 



Musca putris. List. Goed. 132. Goed. Ins. 1. Tab. 73. 



Merian, Europ. Tab. 43. Fig. S3. Frisch. 



Ins. I. Tab. 7. Berk. Synop. 1. 165. Scop. 



Ent. Cam. 904. Gmel. Sijst. Nat. V. 2849. 



89. Fabr. Sp. Ins. 2. 445. 51. Ent. Syst. 



IV. 334. 92. Mant. Ins. 2. 347. 61. Syst. 



Antl. 323. 34. 

 Musca fimeti. Schrank, Fauna Boica, III. 2471. 

 Sepsis putris. Fallen, Ortal. 21. 1. Meigen, Dipt. Europ. V. 



292. 15. Haliday, Ent. Mag. II. 170. 



Oculi ocellique riifo-fusci : antenna nigrae : abdomen glabrum, 

 maris apice breve setosum : pedes nigri ; tarsi subtus fusco 

 pubescentes : alas subhyalinse, costa nigra : halteres flavi, basi 

 fusci : maris femora antica subtus dentata et spinosa. (Alarum 

 longitudo, 2| — 3 lin. ; corporis li — If.) 



Var. /3. — Mas et fem. corpus nigro-aeneum : alae subfuscae. 



July ; on grass beneath trees ; near London. 



■Note. — Linnaeus and other authors supposed this species to 

 be a variety of his Musca casei. 



Sp. 2. Them, pilosa. Mas et fem. Nigra aut nigro-cenea, 

 nitida, abdomine maris apice longe setoso, alis subhyalinis. 



Themira pilosa. R.Desvoidy, Essai sur les Myodaires, 746. 1 . 

 Sepsis superba. Holiday, Ent. Mag. II. 170. 



