544 Mr. T. D. A. Cockevell — Desoriptions and 



The liypocone (fi<?s. 2 & 3) is compressed, bent vatlier 

 for\vard>', and is hii^lier than tlie protocone. Tlie external 

 wall of tlie paracone (fig. 2) is much bent inwards. 



This tooth, therefore, does not resemble any Indian forms 

 hitherto described. In size and general s'.iape it is at first 

 sight somewhat like Chalicotherium (^C'lrcotheriiim) sivalenae. 

 Tlie latter species, however, the type-specimens of which are 

 in the British Museum, shows in one point a very distinct 

 difference not only from the present species, but apparently 

 from all Chalicotlieres with the exception of C. sinense. 



Osborn*, in his description of Eomoropns, states that a 

 protoconule is characteristic of all known Chalicotheres. 

 C. sivalense, however, certainly lacks the cusp, which is not 

 shown in Falconer's figure on either the second or third 

 molars. An inspection of the actual specimens shows that 

 his drawings are correct, and, as the third molar is quite 

 unworn and in good preservation, there can be no doubt that 

 this cusp is really absent. The figure of Chalicotherium 

 sinense (Owen) in the ' Catalogue of Fossil Mammalia of the 

 British Museum ' (part iii. page 165) shows very clearly that 

 the protoconule was absent also in this tooth. The absence 

 of a protoconule may therefore be added as another character 

 to the definition of the genus Circotherhun as given by 

 Holland and Peterson f. 



LVI. — Descriptions and Records of Bees. — XCVI. 

 By T. D. A. CoCKERELL, University of Colorado. 



Augochlora humeralis, Fatten. 



Patten described this species from specimens collected by 

 Williston in ISorth-western Kansas. Robertson suggested 

 tliat it might be fervida, Smith, to which Patton considered 

 it allied. As fervida is wide-spread in Kansas and Texas, 

 and I had nothing agreeing better with humeralis, I supposed 

 that the suggested synonymy might be correct. However, 

 on July 23, 1922, Mr. Earl G. Smith took a female at 

 flowers of Peritoma serridatwn, about five miles south-east 

 of Cornish, Colorado, which agrees excellently with Patton's 



* Bull. Am. Mus. Nat. Hist. vol. xxxii. p. 268. 

 t Loc. cit. p. 211. 



