150 AMERICAN HYMENOPTERA. 



This species is probably closely related to robushis, though 

 the ocelli are placed a trifle farther down from the supra- 

 orbital line than is the case with the male of that species. 



Friese's descriptions of the male and of the n2X\q\.-^ albocau- 

 data are as follows : 



" d^ with elongate antennae, very large eyes, yellow-haired face, 

 thorax mostly yellow-haired, black banded, segments 1-2 yellow-, 3-7 

 black-haired, venter yellowish-haired. Length 15-16 mm." "Var. 

 d^ — with segments 5-7 white-haired. Var. albocaudata n. var." 



The variety albocaiidata may be a color variant of robustus. 

 Is it the same as B. teaimarms Vachal ? 



In Zeitsch. f. System. Hym. und Dipt., Jahrg. IV, Heft 3, 

 page 188, Friese described a form under the name Bombiis 

 weisi Q.S follows: "Abdomen entirely without yellow pile. 

 Should it, perhaps, be considered as a black abdomened form 

 oi robustus f cf from Banos (Ecuador)." This form may 

 be a color variant of robushis. 



Bonibus (Bombias) tecumanus Vachal. 

 Bombus tecumanus Vachal, Rev. Ent. France, XXIII, 1904, p. 10, cf . 



Type. — Vachal writes me that this specimen is in his pri- 

 vate collection and that, after his death, it will be deposited 

 in the Museum Histoire Naturelle de Paris, to which it is 

 already given by testament. 



This species is unknown to me. Vachal's original descrip- 

 tion is as follows : 



" Bombus tecumanus n. sp. ? — Black, black-haired ; band on the col- 

 lar, band on the scutellum, segments 1-2, with yellow pile ; clypeus, 

 frons and vertex with admixture of yellow ; the very apex of the 

 abdomen white. Head short; cheeks shorter than wide; third an- 

 tennal segment obconical, longer than the fourth, almost equalling the 

 fifth ; eyes swollen, slightly converging above, removed from the ocel- 

 lus by fully the diameter of the latter. Wings hyaline. Hind meta- 

 tarsi slender, with long hind fringes. Length, 15 mm. to 16 mm. ; 

 wing, 8 mm. to 9 mm." 



" One male from the province of Tucuman (Girard), my collection. 

 Is it the male of Bombus robustus ?" 



It is evident from the description of the eyes that this 

 species belongs to the subgenus Boynbias. It cannot, how- 

 ever, be a variation of robustus, for in that species the lateral 



