DIPTERA 21 



Fam. SARCOPHAGI DAE. 

 DvscRiTOMViA, gen. nov. 



More or less metallic species, with silvery face. Head in profile subquadrangular 

 owing to the somewhat prominent front, cheeks rather broad, quite bare and covered 

 with silvery tomentum, chin (peristome) straight and horizontal or slightly sloping 

 upwards towards the occiput, highly polished in all the species here described. Eyes 

 bare, separated in the male by about one-fitth of the width of the head, in the female by 

 about one-third. Antennae nearly as long as the face, third joint about four times 

 as long as the second, the latter with a strong apical bristle, arista plumose with long 

 hairs, bare towards the tip. Chaetota.xy of head as follows : vertical bristles in ^ two, 

 parallel and pointing backwards, in $ two inner like those of Z and two outer shorter, 

 pointing backwards and outwards ; ocellar bristles two, pointing forwards ; in ^ a single 

 row of fronto-orbital bristles reaching from the verte.x to the base of antennae, the three 

 or four nearest the vertex parallel and pointing backwards, the others decussating in 

 front view, erect when seen laterally ; in % the fronto-orbital are not quite so numerous, 

 but near the vertex are two in an outer row pointing forwards. Vibrissa near the oral 

 margin, which is somewhat projecting, a few small bristles at the bottom of the facial 

 ridges, these never ascending more than halfway up the face, chin (peristome) with fine 

 hairs on the surface and a row of strong bristles along the lower margin. Thorax with 

 two humeral bristles, only one post-humeral, three dorso-central before the suture, the 

 most anterior of which is much smaller and weaker than the others, three dorso-central 

 behind the suture, three pairs of acrostichal, of which two are before the suture and the 

 third between the hindmost dorso-central, two intra-alar, three supra-alar, and one pre- 

 sutural which lies lower than the post-humeral. Scutellum with three pairs of lateral 

 bristles, one pair of dorsal and one pair ot apical, which decussate. First segment of 

 abdomen without bristles, second and third segments each with two discal and a varying 

 number of marginal bristles, fourth segment and end of abdomen very bristly. Tibiae 

 with scattered bristles, never villose. Wings usually with distinct costal spine. 



Type of genus : D . \Catapiccphala\ limbipciinis Thoms. 



This genus appears to be near Catapicephala Mcq. as defined by Br. and Berg. 

 (Denk. Math. Nat. CI. K. Akad. Wiss., Bd. lx. p. 162), but differs in the absence of 

 bristles on the facial ridges and in the presence of discal setae on the .second and third 

 abdominal segments. In Catapicephala according to the authors referred to "setae orales 

 longae crassae usque ad radicem antemarum ascendentes. Macrochaetae tantum mar- 

 ginales in segmentis 2 — 4." 



Key to the species of Dyscritomyia. 



I. Fore metatarsus of $ armed witli a curved and pointed spur-like projection 



(7) D. limhipennis Thoms. 



„ „ unarmed, simple 2. 



