96 AMERICAN HYMENOPTERA. 



Types.— (Zo\. C. T. Bingham failed to locate Smith's type 

 specimens of this species in the collection of the British Mu- 

 seum for me. Yet it is, of course, possible that they may still 

 be extant. Friese's type specimens of weisioso. in his private 

 collection. I am inclined to the opinion that the weisi $ was 

 a worker of this species. I have before me a male iveisi, deter- 

 mined by Friese, and this specimen is certainly not of this 

 species. I here describe the true male for the first time from 

 two cotypes of that sex, deposited in the collection of the 

 United States National Museum. 



Queen. — I have never seen either a queen or a worker of this species. 

 Smith described these castes as follows : "'Female. — Length 8 lines. 

 Black, pubescent ; the head entirely black, with the clypeus very smooth 

 and shining and delicately punctured. The thorax with black pubes- 

 cence above and beneath, that on the sides pale yellow ; the pubes- 

 cence on the legs entirely black ; the wings fusco-hyaline, the nervures 

 black. Abdomen : the three basal segments clothed with pubescence 

 of a pale yellow, somewhat lemon-colored, that on the third segment 

 not quite extending to the lateral margins ; the apical segment thinly 

 sprinkled with ferruginous hairs." 



" Worker. — Length 5 lines. Colored like the female." 



Handlirsch described the queen and worker together, from 

 two specimens of each caste as follows : " Thorax as \n pul- 

 cher ; abdomen with the first and second segments entirely 

 yellow haired, the third segment yellow in the middle ; fox- 

 colored or brown pile absent ; the sixth segment is pale red- 

 dish haired." 



Friese's description of the worker is as follows : " Black, 

 black-haired ; like B. ephippiatus var. lateralis, but larger ; 

 segments 1-3 yellow-, 4-5 black-, 6 red-haired; with longer 

 cheeks. Length, 15 mm. ; width of thorax, 7i mm." 



Male. Head. — Face with a mixture of dark and pale yellow hairs ; 

 occiput with dark brown or black pile; sides of head, beneath and 

 behind the eyes, with considerable pale yellow pile (most of this light 

 pile is well under the head, the sides immediately behind the eyes 

 being mostly dark). Malar space apparently somewhat longer than 

 its width at apex, about one-fourth as long as eye. Clypeus shining, 

 finely punctate toward the side and upper margins, but sparsely and 

 delicately punctate over a considerable portion of the disc. Third and 

 fourth antennal segments subequal in length, the fifth nearly as long as 



