COLLETID.E. t8g 



probably often passed over for it, it occurs on bramble 

 flowers from June to August. 



C bob ham ; Woking; Hastings; Hayling Island; South- 

 wold; Reigate. Wotton-under-Edge (Perkins). Land's 

 End; (Marquand). Bickleigb; Horrabridge ; (Bignell). 

 Oxford; (R. C, L. Perkins). Lancashire; (Gardner). 

 Norfolk; (Eridgman). Colchester; (Harwood). Ireland; 

 {Ealidaij). 



P. genalis, Tlioms. — Differs from confusa'Nyl. in being 

 rather larger, and in having the face rather longer, the 

 cheeks between the eyes and mandibles distinctly so. 



The cj has also the labrum white, the third abdominal 

 segment simple beneath, and the apex of the sixth ventral 

 segment more truncate, the characters of the seventh and 

 eighth ventral segments are not very pronounced, but the 

 transverse portion of the seventh is narrower, and the 

 hairs on the pointed apical processes longer and apparently 

 more numerous, the apex of the eighth is more produced, 

 and more widely truncate. 



? . This sex may be known from confusus by the longer 

 cheeks, the larger, yellower, more widely triangularly 

 facial spots, and the slightly, almost microscopically, more 

 roughened surface of the basal abdominal segment. 



L. 7 mm. 



Three specimens on bramble flowers in Hollington Wood, 

 near Hastings, in August, 187i*. 



P. brevicornis, Nyl. (^perforator, )S'»u7/i).— Smaller than 

 either of the preceding, black ; head and thorax deeply 

 punctured, the vertex of the former squarer than in the 

 other species, especially in the ? , face below the antenna 

 in the <Jj * spot on the inner side of each eye (often 

 absent) in the ? , white ; the colour in the <? produced 

 laterally above the antennal cavities, scape of the antenuM 

 obconical and very swollen in the (J, simjDle in the ? ; 

 flagellum fulvous beneath in both sexes ; thorax entirely 

 black, wings dusky ; abdomen dull and closely punctured 



