SPII-'EUOCEBA. 173 



(I a. Thorax and scutellum granulated, the margin of the latter denticu- 

 late. Species 3-5. 



1. subsultans, F. Sp. I. ii. 444. 1 (1781); Schr. ; Fal. ; Meig.; 

 Mcq. ; Hal. ; Zctt. — curvipes, Latr. — merdarum, stercoraria, cadaverina, 

 et nccrophcif/a, Desv. Abdominis segnmito seciindo pracjrandi, pedibus 

 posticis elongatis incrassatis ; Mas, femoribus dcivatis. Long. 1^—2^; 

 alar. 3-4 liii. 



Eather dull-black, with f;iint lines on the thorax ; frontal triangle 

 more glossy. Wings yellowish-hyaline, often with brown streaks be- 

 tween the veins. Halteres dingy-white. Abdomen very broad, the second 

 segment appearing very large, as the third is confounded with it ; the rest 

 small, and gradually narrower. Coxas and base of the tibiae rust-brown. 

 Hind legs very long, tvith thick femora and tibia ; spur strong ; hind 

 femora of the male still more thickened. Var. Posterior legs testaceous, 

 with dusky knees and tarsi. 



Generally distributed. (E. S, I.) 



2. monilis, Hal. E. M. iii. 319. 2 (1830). Pedihus simpUcibus, 

 anmdo tarsorum. anticorum. albo. Long. \\ ; alar. 3 liu. 



Head and thorax as in S. subsidtans. Abdomen, in the female par- 

 ticularly, broader than the thorax ; second, third, and fourth segments 

 nearly equal ; fifth small. Hind legs scarcely thicker in the inale than 

 in the female ; fore tarsi rather thick, with the end of the first joint and 

 the entire second white. 



Not common. In Mr. Haliday's collection, (E.) 



3. denticulata, Meig. Zw. vi. 200. 3 (1830); Mcq.; Hal.— 3o- 

 vina, Desv. Capite thoraceque nigris, femoribus posticis maris parum 

 incrassatis. Long. \\ ; alar. 2^-2f lin. 



Dull-black. Arista blackish. Thorax and scutellum shagreened 

 and set with minute points, the former with two impressed smooth 

 lines, the margin of the latter with a number of sharp teeth. Wings 

 hyaline, with brownish veins of a dusky tinge, with the costal vein 

 blackish. Halteres whitish. Abdomen as in -S". monilis. Coxae and 

 knees brown; hind femora of the male a little thickened, of the female 

 slender. Var. Legs testaceous ; tarsi and tips of fore tibial dusky. 



Common. (E. S. I.) 



4. vaporariorum, Hal. E. M. iii. 319. 3 (1836). — coprina, Desv. 

 Capite thoraceque nigris, femoribus posticis maris clavatis, fcem. parum, 

 incrassatis. Long. 1 ; alar. 2 lin. 



Kesembles S. denticulata, but the hind femora of the male are nearly 

 as large as in S. subsultans, and a little thickened in the female also. 

 Thorax generally without impressed lines, but more irregularly and 

 thinly shagreened about the middle than elsewhere. Abdomen attexm- 

 ate behind. Wings shorter than in S. denticulata, and hind metatarsus 

 less dilated. 



Common. (E. l.j 



