piirsocEPiiALA. 357 



6. Wiiig-baud dying away frradually at tip ; 



apical segineui of 3rd veiu distinctly 

 sutYused ; thorax with three short blackish 



stripes, nearly contiguous. Length 14 mm. nursei, sp. n., p, 300. 

 "Wing-band continuing dark brown to tip 

 of ord vein ; thorax witli a median 



blackish stripe, sometimes indistinct or [p. 361. 



absent. Length 8-10 mm arrjentifera, sp. □., 



7. Wing-band dying away gradually at about 



tip of 2ud vein munda^ Bruu., p. 30L 



"Wing-band ending truncately, generally 

 clearly demarcated 8. 



8. Fourth and 5th veius not basallyinfuscated, 



nor the inttn-vening space 9. 



Either 4th or oth vein infuscated, or both, 



or the intervening space 11. 



9. Antennaj wholly black atricumis, sp. u., p. 363. 



xVntenna) mainly orange or brown 10. [p. 363. 



10. Thorax wholly black aimuUfera, Bruu., 



Thorax browni-h-ycllow or orange-brown . calopus, Big., p. 364, 



11. Hind femora Avholly orange diffusa, sp. n., p. 365. 



Hind femora with a broad median black 



ring tc-nella, Big., p. 366. 



279. Physocephala bicolor, sp. iiov. (PI. YI, fig. 10.) 



S 2 • Head varying from rather pale yellow to orange-yellow ; 

 vertex sometimes wholly black, the colour extending in the middle 

 irregularly forward nearly to base of antennae, or carried down- 

 wards for a short distance on each side of face ; sometimes the 

 vertex and upper part of the frons only are more or less brownish. 

 There is a narrow, black, distinct stripe on tlie face just below the 

 antenna) ; the latter are dark brown or black, 3rd joint more or less 

 reddish or orange on basal half below, sometimes 2nd and 3rd 

 joints almost wliolly reddish below ; 2nd joint 2| to 3 times as 

 long as 1st, 3rd joint (apart from style) more than half as long 

 as 2nd ; style three-jointed, with second joint produced on inner 

 side and 3rd joint small, thus causing the antenn.'e to appear as 

 if bisected at the tip. Occiput, moiitli-opening and lower part 

 of head black or dark brown, also the proboscis, whicli is fully 

 double the length of the liead. I'hora.v: dorsum mainly black, 

 punctate, with very tiny black bristles ; side margins, humeri and 

 scutelluin distinctly, and hind margin and posterior corners less 

 distinctly, brownish-orangt; ; pleune black, except that the parts 

 below tiio humeri and behind the wing-base, also an exceedingly 

 narrow vertical stripe immediately below the wing-base, are 

 brownish-orangH ; metanotum black, upper edge often more or less 

 orange. There are some indefinite whitish reflections on pleurie. 

 Abdomen: 1st segment black; lind brownish-orange, more or less 

 broadly blackish in middle; iiril black, rather narrowly brownish- 

 orange at base and on hind margin ; 4th and r)tii mainly black, 

 4th more or less broadly l)ehind, and oth more iiarrowly, dull 

 orange; 6tli generally similar to 5th. On 2iid, 3rd, 4th and 5th 



