32 G. CALIGINEA: THOEAX AND ABDOMEN. 



showing, as in the latter species, a dark brown elongate area 

 below when viewed from the side ; ocellar triangle drab-grey or 

 mouse-grey, ocellar spot and dark brown band uniting vertical 

 bristles as in G. palpalis ; antennae mouse-grey, narrowly cream- 

 bufF at apex of second joint and extreme base of third joint on 

 outer side, anterior and posterior edges of third joint in both 

 sexes without a long and conspicuous fringe of fine pale hair * 

 (cf. Figs. 11 and 13), and its distal extremity only moderately 

 prominent, arista distinctly longer and more slender (tapering off 

 less abruptly) than in G. palpalis [cp. Figs. 11 and 12); palpi 

 mouse-grey, darker above and towards distal extremity. 



Thorax. — Dorsum with dark brown markings of same type 

 as in t3^pical form of G. palpalis, but often somewhat more 

 extensive ; pleurae and interspaces between markings on dorsum 

 light mouse-gvey ; scutelliim, at least in 9 ? somewhat more elon- 

 gate than in G. palpalis, apical scutellar bristles in 9 unusually 

 short, reduced to small spines, hind margin of scutellum and 

 interspace between distal extremities of dark blotches on dorsum 

 cream-buff. 



Ahdonien. — First segment cream-buff or buff', with a dusky 

 (dark grey) patch on each side ; dorsum of second to sixth 

 segments inclusive dark sepia-brown ; median paler region on 

 dorsum of second segment cream-buff" to ochraceous-buff" or pale 

 cinnamon, the central lanceolate area enclosed within the usual 

 admedian grooves exhibited by this segment often paler than the 

 region outside the grooves ; one or more of the four segments 

 following the second usually with a paler (buff, ochraceous-buff, 

 or cinnamon-coloured) median area on the dorsal svirface ; in 

 some specimens the third and fourth, third, fourth, and fifth, or 

 even the third to the sixth segments each show a narrow paler 

 median longitudinal streak, which usually fails to reach the hind 

 margin of each segment ; in others the paler area on the third 

 segment, or on the third and fourth segments is as broad as that 

 on the second, while on subsequent segments the paler area is 

 reduced to a streak ; lateral margins and posterior angles of 

 second to sixth segments inclusive smoke-grey, scai'cely visible 

 from above ; pollinose dorsum of seventh segment varying from 

 smoke-grey to cream-buff' or buff", often infuscated at base in $ ; 

 liypopygiiim of ^ resembling that of G. palpalis, Rob.-Desv., in 



* There is a fringe on the third joint of the antennae, but it is so short 

 and the hairs composing it are so minute as to be scarcely noticeable when 

 the joint is examined in profile under an ordinary platyscopic lens. 



