416 ME. E. SATJNDEES OlST THE TONGTJES OE THE 



triangle ; the base of the triangle or anterior margin is widely 

 emarginate; projecting beyond this triangle is the apical portion 

 of the lingua, whicb almost appears to be produced from under 

 the basal canopy, i. e. it is 04i a lower level than it ; it is slightly 

 rounded at the sides and deeply and angularly cleft in the middle 

 right into its base ; the canopy and the surface of both the basal 

 and apical portions are exceedingly finely ridged transversely, and 

 set with very short bristles, and the apical portion is also covered 

 and fringed round its edges with very fine soft long hairs. 

 Mentum beneath about 2^ times as long as wide ; labial palpi 4- 

 jointed, the basal joint much wider and longer than the others. 

 Submentum hyaline, short, and subtriangular. Lora short and 

 not well-defined, as they gradually merge into the investing 

 membrane which covers the space between the cardines, this 

 membrane becoming gradually darker in colour, and scleritic as 

 it approaches the lora. 



Peosopis, Fahr. Syst. Fiez. p. 293. (Pi- III. figs. 3-5.) 



Labrum transverse, very slightly angulated in front, its anterior 

 margin armed with a row of very strong testaceous spine-like 

 hairs. Epipharynx extending beyond the spines of the labrum 

 and somewhat pointed. Sclerites of the hypopharynx strongly 

 developed, slightly curved above the maxillae. Scales at the 

 base of the maxillae well developed, elongate, and fringed with 

 long hairs ; blades of the maxillae short, somewhat sinuate on the 

 external margin, their inner edge menabranous, fringed with 

 thick bristles round the apex, which is widely rounded. Surface 

 impressed with a few irregularly disposed punctures. The 

 reflexed under margin with a series of sharp bristles. Maxillary 

 palpi 6-jointed. Paraglossae elongate, about twice and a half as 

 long as wide, not much narrowed to the apex, the apex fringed 

 densely with fine hairs. Lingua very short and wide, its basal 

 portion in the form of an obtuse-angled triangle, very finely 

 ridged transversely and set with bristles, until near the apex, 

 where the ridges and hairs stop, and are replaced by a wide band, 

 which under a |-iuch power is apparently glabrous, and its 

 surface finely shagreened or rugose ; the anterior margin 

 of the basal portion or canopy is almost straight ; the apical 

 portion projects from beneath the canopy, much as in Colletes, 

 but is very short and not deeply cleft, but only widely and 



