1869.) 269 [Cresson. 



Gulf of Mexico, and presented to the State Cabinet; the second was 

 taken at Truro and presented to the Museum of Comparative Zoology; 

 the third, which had bitten off and swallowed large portions of a 

 sword-fish, was captured in 180-1, at Provincetown,. and given to the 

 Society. A fourth specimen, a female, and the one described above, 

 was taken at Provincetown, in August last. 



In external form it resembles C. Aticoodii more than any other 

 species; but differs from that in the foi-m of the mouth, ia the shape 

 and armature of the teeth, and in the direction and comparative 

 length of the branchial orifices. 



The specimen seemed to be a young one, as no Bemorce were 

 found attached to its head, as was the case in the specimen formerly 

 presented to the Society; upwards of twenty parasites of one species 

 were taken from the outer surface of the body, and three of another 

 kind from its mouth; in its stomach and intestines sevei'al tape- worms 

 of various lengths were found ; in the stomach were remains of sev- 

 eral Dog fish in a state of decomposition ; the liver was large, and 

 yielded about five gallons of oil. 



Section of Entomology. January 27, 1869. 



Mr. C. S. Minot in the chair. Tliirteen members present. 

 The following pa^^er was read : — 



Descriptiox of North American Bees. No. 2. By E. T. 



Cresson. 



Family ANDRENID^. 



Genus Prosopis Fabr. 



§. Species from the United States. 



1. P. basalis Smith, Brit. Mus. Cat. Hym., I, p. 23. 9 . Entirely 

 deep black; head and thorax opaque, finely punctured, more closely 

 so on the face; mesothorax with a central impressed line, and a shori 

 one on each side over the tegulfe; enclosed space at base of metatho- 

 rax rugose, the latter pubescent; wings hyaline, the apical half faintly 



