166 AMERICAN HYMENOPTERA. 



species and it resembles dahlbomii considerably in colora- 

 tion, but the pile is of a darker, deeper red than in that spe- 

 cies. Ricbiaindus seems to have no very close relatives 

 among the known forms of the New World, except hand- 



lirschi. 



Bonibus (Bombias) baeri Vachal. 



? Bombus bicoloratus Smith, Descr. New Spec. Hym., 1879, p. 132, 

 n. 6, 9 . (Excl. patria). 

 ^a^r/ Vachal, Rev. Ent. France, XXIII, 1904, p. 10, S c?. 

 " baeri Friese, Flora og Fauna (Denmark), 1908, p. 92. 



Types. — Vachal's specimens (two 5 's and one d^ ) are in his 

 private collection and are given, by his testament, to the Mu- 

 seum of Natural History of Paris. Smith's type of bicolora- 

 tus may probably be identified in the collection of the British 

 Museum. Vachal's specimens came from Argentina (Lara). 

 The queen is here described for the first time, from seven 

 cotypes of that caste from Puno, Peru, deposited in the col- 

 lection of the Museum of Comparative Zoology at Cam- 

 bridge. 



Malar space rather short. Female ocelli placed sovieivhat, but not 

 far, below the supra-orbital line. Clothiyig of head and thorax dark. 

 Dorsum of abdomen entirely covered with bright coppery red pile. Legs 

 black. Wings rather light. 



Quee7i. Head.— With, only black pile on face, occiput and sides. 

 Malar space about as long as its width at apex, about one-fifth as long 

 as eye. Clypeus jrather strongly and evenly punctate. Ocelli rather 

 large and placed somewhat below supra-orbital line, nearly in narrow- 

 est part of vertex ; the lateral ones but slightly nearer to the margins 

 of the eyes than to each other (transitional Bombias in this respect) . 

 Third antennal segment longer than fifth and fifth longer than fourth. 



Thorax.— PWe black, but in some cases with a very slight coppery 

 reflection in certain lights. 



Abdomen.— Dorsum clothed entirely with bright coppery red pile, 

 somewhat lighter toward apex. Venter mostly dark, but with a slight 

 sprinkling, especially on lateral portions of apical margins of apical 

 segments, of reddish hairs. Hypopygium without median carina. 



Wings. — Light colored for Bombus queen ; the basal two-thirds of 

 the fore pair somewhat infuscate, the outer third being nearly clear 

 transparent. 



Legs. — Coxae, trochanters, femora and tibiae with black pile only. 



Worker and Male. — These castes are unknown to me. The 

 original description of them is as follows : 



