APID/E. 369 



L. 12-22 mm. 



Very common and generally distributed, intermediate 

 varieties of the $ are rare, but they are very common in 

 ? and ? . It is an underground builder, and forms large 

 communities. 



B. Latreillellns, Kirh. [subterraneus, Thorns., Tunstal- 

 lanits, Kirh. pars, elegans, Smit/i, fragrans, Kirh., distin- 

 guendus, Mor.). — Rather like hor forum in some of its 

 varieties, but easily distinguished by the shorter face, and 

 shorter, more even pubescence. Head clothed with black, 

 or in var. distinguendus with pale yellowish hairs intermixed 

 with a few black ones, those of the vertex of the (J in all 

 the varieties pale, cheeks not half so long as the eye, tongue 

 considerably shorter than in hortorwm ; thorax clothed with 

 black hairs, anteriorly and posteriorly banded with pale 

 yellowish, or {var. distinguendus) with yellow hairs, with a 

 wide black band between the wings, wings slightly smoky ; 

 abdomen clothed with short, even, close fitting pubescence, 

 black on the first and second segments and the base of the 

 third, dingy white on the apex of the third and on the 

 fourth and fifth, black on the sixth, or in var. disiinguendus 

 entirely clothed, with the exception of the apical segment, 

 with yellow hairs, the hairs at the base of the first and 

 second segments of rather a darker shade; in the black 

 varieties the basal segments have often paler transverse 

 bands ; in the S the colour of the pubescence of the abdo- 

 men varies from almost entirely black to entirely pale 

 yellow, running through every intermediate variation of 

 transverse banding, beneath clothed with pale or dark 

 hairs according to the varieties, apical segment of the ^ 

 with a tuft of long hairs on each side, armature with the 

 sagittse truncate, and produced laterally at the apex into a 

 transverse subquadrate process, and also dentate laterally 

 near the middle, the tooth somewhat trifid, the lacinia of 

 the stipites very short, truncate apically, with a small, 

 curved tooth at the inner angle of the truncature ; betweea 



B b 



