214 E. T. CRESSON. 



with yellowish pubescence at tip, basal segment blackish, thinly clothed with 

 pale pubescence. Length .40 inch. 



Hah. — Mexico, (Sumichrast). One specimen. This is allied to 

 falviventris Cress. 



Centris otomita. — %. — Small, black; head clothed above with black 

 pubescence, that between antennae and on cheeks dense and white ; clypeus, 

 labrum, mandibles except tips and spot at tip of scape beneath, yellowish- 

 white; thorax clothed with a dense fulvo-ochraceous pubescence above, that 

 beneath nearly white; tegulse fulvous; wings hyaline; legs brown, varied 

 with black, clothed with white pubescence, posterior femora swollen, their 

 tibise and base of tarsi fringed behind with long black pubescence, basal joint 

 of their tarsi with a sharp spine on middle of posterior edge ; abdomen shining 

 black, the basal, two or three apical, and the ventral segments clothed with 

 pale ochraceous pubescence. Length .40 inch. 



Hal). — Mexico, (Sumichrast). One specimen. 



Apatlins? calirornictis. — % . — Black; head clothed with yellow pubes- 

 cence, more or less mixed with black on occiput and cheeks; face long, the 

 clypeus convex, smooth, shining and almost nude, space between the eyes 

 and base of mandibles very broad and polished; thorax densely clothed with 

 yellow pubescence in front of the tegulse, elsewhere it is black, sometimes the 

 Bcutellum is more or less mixed with yellow, and occasionally the pubescence 

 of the thorax is entirely yellow except a black band between the wings; 

 wings fusco-hyaline, clearer towards base; legs with short black pubescence, 

 sometimes more or less mixed with yellow; the pubescence of the abdomen is 

 generally black, with that on segments four and five yellow; sometimes the 

 apical margin of segments 1 — 3 are yellow, and in one specimen the pubescence 

 of the abdomen is entirely yellow except that on middle of segments two and 

 three, and on apical segment. Length .55 — .65 inch. 



Hab. — California, (H. Edwards). Twelve specimens. This species 

 has the same form as that of elatiis Fabr., having the face long as 

 in Bombus, and the clypeus prominent and sparsely pubescent, in 

 which respect they differ from all the other species of the genus 

 known to me. 



Pantirgus nevadensis. — % . — Piceous, clothed with long fulvous-yellow 

 pubescence, rather dense on face, cheeks, thorax and legs; face broad; clypeus 

 except two black points, and a triangular spot on each side on lower angle of 

 face, yellow; tips of mandibles castaneous ; flagellum fulvous beneath; wings 

 hyaline, dusky at tips, nervures and stigma brown, neuration as in andrenoides ; 

 legs brown-black, slender, clothed with long pale pubescence; abdomen polished, 

 thinly clothed with pale pubescence, more dense at apex, lateral apical margins 

 of the segments with a fringe of short pale pubescence, more obvious in certain 

 lights. Length .30 inch. 



Hab. — Nevada, (Morrison). Eight specimens. This is closely 

 allied to andrenoides Cress. 



