468. 



PSITHYRUS RUPESTRIS. 



The black- winged Humble-bee. 



Order Hymenoptera. Fam. Apidse. 

 Type of the Genus, Apis rupestris Fab. 



PsiTHYRUs LeP. — Bombus Lat., Curt. — Bremus J«r. — Apis Xm?z., 

 Kirby. 



AntenncB inserted at the middle of the face, longer than the 

 head, geniculated, filiform, 13-jointed in the male, basal joint 

 long clavate, 2nd minute, 3rd obovate, nearly as long as the 

 5th, 4th subquadrate, only half the length of the following 

 which are oblong, the terminal joint compressed and rounded 

 at the apex (1 (5^) ; similar but shorter in the female, and only 

 12-jointed. 



Labrum transverse, subovate-trigonate, very hairy (2). 

 Mandibles crossing, alike, long narrow and slightly curv'ed, 

 ovate at the apex, or rounded obliquely, hairy externally (3). 

 Maxillee as long as the mentum, very hairy externally, with a 

 brush of hairs on the inside (4), terminated by a homy lobe as 

 long as the tongue, broad at the base and attenuated to the 

 apex (a). Palpi minute, formed of one oblong joint attached 

 to a scape at the external apex of the stipula (6). 

 Mentum long and rather stout, linear, slightly attenuated to- 

 wards the base, the anterior margin sinuated (5). Tongue 

 nearly as long as the palpi, tubular, slightly attenuated at the 

 apex and terminated by a little mouth, the outside thickly 

 clothed wdth depressed hairs (c). Paraglosscc short, broad 

 rounded, and ciliated at the apex {d, with one detached and 

 more magnified). Palpi long, rather broad and slightly atte- 

 nuated, the internal margin hairy towards the apex, 4-jointed, 

 basal joint more than twice the length of the 2nd ; the 3rd and 

 4th very minute obovate (b). 

 Neuters none. Head vertical ovate : eyes long and narrow : ocelli 

 3, placed transversely in a curved line. Thorax large and globose ; 

 sciitellum large semiorbicular . Abdomen ovate or oblong, incurved 

 at the apex. Wings, superior with one marginal, 3 nearly equal 

 submarginal and 3 discoidal cells. Legs, anterior small. Tibiae 

 spurred at the apex, posterior convex and very hairy externally, 

 especially in the female (8 f), smaller, straight and slightly clavate 

 in the male. Tarsi 5-jointed, basal joint long and dilated, posterior 

 not producing a tooth at the base. Claws with a tooth on the inside : 

 pulvilli very pubescent. 

 Obs. Fig. 1 . is the antenna of B. Barbutellus Don. 



Rupestris Fab. — Curt. Guide, Gen. 723. 1. 



Female black, shining, punctured, clothed with black hairs : 

 abdomen with the 4th and follow'ing segments clothed with deej> 

 orange hairs : wings long, dark brow'n and iridescent : tarsi 

 rusty brown, the basal joint black, clothed inside w'ith ferrugi- 

 nous pile. Male not identified. 



In the Author s and other Cabinets. 



