G. MEDICOEUM : HYPOPYGIUM AND HECTORS. 99 



second joint dark brown, third joint (tip of which is moderately 

 prominent) greyish brown or dark mouse-grey with a light grey 

 pollinose shimmer, arista bufF, terminal joint fairly stout, dark 

 brown at base beneath, branched hairs seventeen to nineteen in 

 number ; palpi buff, mouse-grey on upper portion of outer surface, 

 and darker or even dark brown at tips ; prohoseis hnlh pale 

 yellow. 



Thorax. — Dorsum drab-grey, with the usual dark markings 

 seal-brown or light seal-brown and fairly distinct ; pleurae smoke- 

 grey ; pectus fawn-coloured, no dark blotches (or merely faint 

 vestiges thereof, much reduced in size) on sternopleurae ; upper 



"Fig. 24. 



Distal extremity of cT abdomen of (A) Glosmmhrevipalpis, Newst., and (b) O. medicorum, 



sp. nov. (ventral aspect), showing (h) hypopygia and (heet.) hectors.* (X 15.) 



surface of scutellum brownish, impressed median line and under 

 surface buff, apical scutellar bristles of 9 of medium length. 



Abdomen. — Dorsum dark brown, not banded, first segment, 

 median area of second segment, except hind border, and sometimes 

 a similar area on following two or three segments buff or 

 ochraceous-buff, seventh segment in both sexes yellowish-grey 

 pollinose ; liijpopjjguim and hectors * of (J as shown in Fig. 24 b ; 

 hypopygium buff pollinose, viewed from below broader (therefore 

 relatively if not actually bulkier) than in G. hrevlpalpls, Newst. ; 

 hectors beset with relatively very coarse short bristles or minute 

 spines, placed close together ; the group of minute spines forming 



* See p. 14 (first paragraph and note *). 



