470 



APID.i:. 



826. Lithurgus dentipes, Smith, Cat. i, p. 146, S; DoU- Torr. Cat. 

 X, p. 41(i. 



$ . Allied to and closely resembling L. atratus, but a nar- 

 rower, somewhat (smaller species ; the punctures on the head 

 •and thorax and on the outside of the tibia) are much finer; the 

 abdomen is more convex, not so flat ; and above all the legs are very 

 much stouter, the femora and tibije of the intermediate and posterior 

 legs considerably thickened, the former being deeply channelled 

 and bideutate near the apex on the underside. Black, the apical 

 six joints of the antennae and the abdomen obscurely piceous, the 

 apical margins of segments 1-5 paler; the pubescence white as in 

 L. atratus, the 6th segment covered with fuscous-black pubescence ; 

 the pollen-brush always black. 



(S similar ; the face with pale yellow, the disc of themesouotum 

 with ochreous pubescence, the apical joints of the tarsi rufo- 

 testaceous. 



Hah. Sikhim ; Mainpuri, N.W.P. {Home) ; Tenasserim ; New 

 Holland (Smith). $ , Length 10-12 ; e.rp. 20-22 mm. J slightly 

 smaller. 



Genus MEGACHILE. 



Megachile, Lafr. Hist. Nat. Ins. iii, p. 382 (1802). 

 Trachusa, pt., Jurine, Hym. p. 247 (1807). 

 Chalicodoma, pt., Lei)el. Hym. ii, p. 309 (1841). 



Type, M. centuncularis, Linn. 



Ranrje. All parts of the world. 



Head variable, generally as wide as the thorax ; mandibles stout, 

 broad and flattish towards apex, with 4 teeth, the exterior tooth 



acute ; ocelli in a triangle 

 placed forward ou the vertex ; 

 antennae filiform, geniculate ; 

 labial palpi 4-jointed, basal 

 two joints elongate, subequal, 

 apical two minute, subclavate, 

 articulated outside near the 

 apex of the 2nd joint ; max- 

 illary palpi 2-jointed, short, 

 the basal joint shortest, the 

 apical joint obtuse at the 

 apex and setose ; the labrum 

 oblong,with the sides parallel. 

 Thorax short, subglobose; the 

 scutellum often projecthig 

 posteriorly and overhanging 

 the median segment ; legs 



u- ,.« ,, ,., , ,.,, moderately stout, the poste- 



¥\s.ii)b.—Mcriachile. 1, mandible: . . ••/r^\ ^ ^.i^ j i 



2, maxilla ; 3, labium. (Much enlarged.) ^^^r tarsi ( $ ) flattened and 



clothed on the inner side 



with dense short pubescence ; the tibiae (especially the anterior pair) 



