218. 

 MEGACHILE WILLUGHBIELLA. 



Order Hymenoptera. Fam. Apiariae Lat. Apidae Leach. 



Type of the Genus Apis centuncularis Linn. 

 Megachile Lat., Leach. — Trachusa Jur. — Xylocopa, Centris, Antho- 

 phora Fab., Panz. — Phyllotoma Dum. — Apis Linn., Kirby, Panz. 

 AnienncE inserted at the middle of the face, rather remote, fili- 

 form, slightly geniculated; 13-jointed in the male, basal joint 

 long, 2nd minute, 3rd small and slender, the 9 following of equal 

 length, oblong cylindric, last joint longer wedge-shaped (I) : 

 shorter and 12-jointed in the female. 



Labrum inflected large, elongate-quadrate, a little dilated at the 

 base, convex, rough, pubescent, slightly ciliated (2). 

 Mandibles meeting over the proboscis and labrum, convex, bent, 

 pilose, quadridentate, the external tooth the largest in some spe- 

 cies, sometimes nearly wanting in the males (3), 

 Maxilla long, terminal lobe with a rib at the back, long, lan- 

 ceolate, acute, inflexed, internal edge and apex ciliated (4a). 

 Palpi very short, attached to a fixed scape, having the appearance 

 of a basal joint, biarticulate, 1 st joint globose, 2nd subovate (4 b). 

 Mentum horny elongate linear (5). Palpi larger than the lip 

 4-jointed, 1st and 2nd joints compressed, internally membranous, 

 pubescent, basal joint long and broad, 2nd much longer, attenu- 

 ated and pubescent at the apex, 3rd inserted near the apex of the 

 2nd, small obovate, 4th a little longer, subclavate (b). Tongue 

 as long as the 2 first joints of the palpi fleshy slender cylindric 

 hollow, externally pubescent (c) with a bundle of hairs towards 

 the apex in some (c*). Paraglossce very short acuminated.' 

 Head broad, almost as large as the thorax. Ocelli 3 in triangle. Abdo- 

 men oval and convex in the viales, subtrigonate, depressed above, and 

 thickly pubescent beneath, in the females. Wings, superior with 1 

 costal, 2 subcostal and 3 discoidal cells, posterior limb without ner- 

 vures. Legs robust. Tibiae subtrigonate, short, furnished with a 

 bent spine at the apex, the posterior pair having 2. Tarsi longer 

 in the male than female, 5-jointed, basal joint the longest and most 

 robust, 3 following short, 5th longer. Claws hooked and bifid. 

 Fig. ] & 8 are from M. Willughbiella mas. c* from M. ligniseca mas. 



WiLLUGHBiELLA Ray, Kirbifs Mon. Ap. Ang. 2. 233. 41. 



Male. Black, minutely punctured, clothed witli pale sulphur- 

 coloured pubescence, especifiUy the face. Antennae with the 

 terminal joint compressed ovate, subcapitate (1). Abdomen 

 notched at the apex. Anterior thighs produced internally, the 

 apex of their tibiae and the tarsi straw colour, the latter palmate, 

 basal joint very large and hollow, which with the 3 following are 

 united on one side, by a pilose and deeply ciliated membrane (8). 

 Female, less pubescent than the male above, the face clothed with 

 shorter and darker hairs, the apex of the antennae simple. Abdo- 

 men with the segments whitish at their margins, the hairs beneath 

 bright ferruginous, black at the apex (6). Anterior feet simple. 



In the Author s and other Cabinets, 



