Monographie der Bienen-Gattungen Chelostoma Latr. und äeriades Spin. ^49 



very hirsute with white or subciuereous hairs ; wiiigs a little embrowned, 

 with black veins and base-covers; leg.s hairy; abdomen subcyliudrical, 

 hirsute with black hairs , incurved , with the apex of the t'our inter- 

 mediate segment.s fringed with white hairs; anal Joint witli a concavity 

 above, obtuse; last ventral segment forcipate, rufo-piceous." 



Nord-Amerika. 



Scheint dem Chel. moscaryi näher zu stehen. 



Chelostoma californicum Cress. 



CJhelostoma californica Crkss.: Trans. Amer, Ent. See. T. VII, p. 108, 



d. 1878. 



„cJ. Black, shining, very finely punctured, head and thnrax thickly 

 elothed with a long fulvo-ochraceous pubescence, sparse on vertex and 

 mesothorax, and pale on cheeks and thorax beneath; tegulao picoous ; 

 wings fuscous , second submarginal cell narrowed at least two-thirds 

 towards the marginal ; legs slendor, elothed with short pale pubescence ; 

 abdomen narrow , convex, mnch incurved at tip, elothed with a very 

 short ochi'aceous pile, the apical margin of the segments narrowly fringed 

 with ochraceous pubescence; apical segment with three obtuse teeth, 

 disk deeply excavated; second ventral segment with a large transverse, 

 obtuse elevation. Length 35 inch. Hab. California (H. Edwards). 

 One specimen." 



Califomien. 



Nach der Form des letzten Hinterleibssegments zu schliessen, steht 

 Ch. californicum dem Ch. nigricornc unter den paläarctischen Arten 

 am nächsten. 



Chelostoma rugifrons Smith. 



Chelostoma rugifrons Smith: Cat. Hym. Ins. Brit. Mus. T. II, p. 220 



? 1854. 

 Chelostoma rugifrons Cress.: Proc. Ent. Soc. Phil. T. II, ]). 383, $, 



(Abschrift der Beschreibung Smith's) 1863. 



„Female. Length 5 lines. Black, the head strongly punctured; the 

 face has some white pubescence on each side at the insertion of the 

 antennae; the mandibles very stout, having a tooth near their baso 

 within , their apex tridentate , the middle tooth miuute , lougitudinally 

 grooved above. Thorax strongly punctured; its pubescence as well as 

 that of the legs, white, the claw-joint rufo-testaceous, the tarsi beneath 

 fulvous, the wings subhyaline, the nervures black. Abdomen cylindric, 

 shining and strongly punctured ; the basal and apical margins depressed : 

 the iirst and three following segments have very narrow fosciae of 

 white pubescence, wliich is rather wider at the lateral margins; the 

 fasciae cro.ss the segments about one-third within, curving backwards to 



