DIPTEROUS TRIBE SPH,«ROCERID^:. 319 



Copromyza subsultans . Fall. Heterom. 7. No. 3. 

 Borborus subsultans . . Meig. VI. 200. No. 2. 

 Sphaerocera subsultans . Macq. S. a B. II. 565. No. 1. 

 Sphaerocera curvipes . . Latr. Gen. IV. 359. 

 Lordatia merdarum, sterco- 



raria, cadaverina, necro- 



phaga Rob. D. 809. Nos. 1, 2, 3,5. 



Rather dull black, with faint lines on the thorax : frontal triangle 

 more glossy : there are a number of minute points disposed in 

 distant lines on the thorax, and scattered over the scutel : ab- 

 domen very broad, the 2d segment appearing very large, as 

 the 3d is confounded with it ; the rest are small, and gradually 

 narrower : the coxae, and the base of the shanks are rust brown ; 

 or the posterior legs are testaceous, with the feet, and generally 

 the knees dusky ; the hind legs are very long, both the thighs 

 and shanks thick, and the spur strong ; in the male the hind thighs 

 are still more thickened : poisers dirty white : wings yellowish 

 hyaline, often with brown streaks between the nerves : when newly 

 excluded, the insect is of a pale greenish brown, with paler legs, 

 darker abdomen, and hyaline wings ; and most species of the tribe 

 at that period are of the same colour. (Length 1* — 2h ; wings 

 3—4 lines.) 



Every where abundant on dunghills, hotbeds, &c. 



Sp. 2. Sph. monilis. Pedibus simplicibus, annulo tarsorum 

 anticorum albo. 



Head and thorax as in No. 1 : abdomen as in Sph. denticulata : hind 

 legs longer and more slender than in this last, and the 1st joint of 

 the feet less dilated : fore feet rather thick, with the end of the 

 first joint and the entire second white : the hind legs are scarcely 

 thicker in the male than the female. (Length 1a ; wings 3 lines.) 



Found in the New Forest by F. Walker, Esq. ; also near 

 London. 



AA. Thorax et scutellum granulati, hnjus mar go denticulatus. 



Sp. 3. Sph. vaporariorum. Capite thoraceque ?iigris ; femo- 

 ribus posticis parum incrassatis fem. clavatis mas. 



Lordatia coprina, Rob. D. 809. No. 4. 



Resembles the following species, but the hind thighs of the male are 

 nearly as large as in No. 1 , and a little thickened in the female also : 



