PUYSOCEPHALA. 365 



vi. 1916 (L, C. Bartless). The species was originally desci-ibed 

 from Poiidicherry. i'i/J)(i of culopiis in IJigot's collection, that ot" 

 quddrata in the Indian Museum. 



lledesi-rilied from sevt-ral of both sexes, which seem referable to 

 this species, from various sources. The exact limits of the dark 

 wiug-band are uncerrain, and the species appears variable in the 

 coloration of the antenna) and of some other parts of the body. 



Bigot has unaccountably mistaken the 1st pos^terior cell for the 

 discal, both in this and otiier species ; this is shown by his remark 

 (referring to calopns) that the wing-band ends " about opposite the 

 middle of the discal cell, of uhich it also covers the base." 



289. Physocephala diffusa, sp. nov. 



(S $. Head yellow; vertex dull yellow and tumid; sides of 



frons orange-brown, this colour extending some distance down the 



face, with a narrow darker line on each sside of the deeply sunken 



foveas, which latter are pale yellowish with a dark broun streak 



on the lower part of each. Proboscis dark brown, black at base 



and tip. Antennae bright orange-brown ; 3rd joint, apart from 



style, barely half as long as 2nd, its tip darker. Occiput yellowish, 



each side with an irregular brown patch, these patches being 



connected by a transverse stripe ; hinder part of eye-margins 



dusted with pale golden-yellow. Thorax brownish-orange with 



dusty whitish reflections; dorsum rather darker, with traces of a 



median blackish stripe on the anterior margin ; scutellum con- 



colorous; metanotuu) black, gold-dusted; pleural brownish-orange, 



with a silvery-white side stripe extending from in front of 



the wing-base to tlie middle coxa; metapleura? with conspicuous 



golden-yelh)w dust. Abdomen orange; 1st segment darker brown 



on the dorsum and with the hind margin white-dusted; 2nd 



segment narrowly white-dusted on the hind margin and more 



broadly so at sides towards apex ; 4th and 5tli with basal half 



more or less dark brown ; hind border of 3rd, remainder of 4th 



and otii, and whole of the 6th, dusted with gold. Leris: coxae 



blackish, anterior pairs with slight whitish reflections, hind pair 



conspicuously dusted with yellowish-wliite ; femora orange; tibia) 



pale yellow at base, their outer sides shining, dusted with 



yellowish-white; tlie hind pair are distinctly brown towards the 



tips; tarsi orange, brownish on up])er side, with black bristles. 



WiiKjs grey ; a dark brown band on anterior margin to a little 



beyond ti|) of 2nd vein (varying with the individual), generally 



rather sharply delimited opposite posterior cross-vein; the band 



<lelimited hindwards by 3rd vein, but filling about basal half of 



1st i)()sterior cell, leaving remainder quite clear. Sometimes the 



costal band extends indistinctly to the tij) of the 3rd vein, or the 



tip of the 3rd vein may bear a slight isolated infuscation. Base 



oB 3rd posterior cell sometimes brownish ; costal cell slightly pale. 



Halteres brownish orange. 



Leni/fh, 7-S mm. 



