THE CANADIAN ENTOMOLOGIST. 325 



Males. 



Hind claws long, with a very short inner tooth ; hind metatarsus 

 arcuate, bevelled at the expense of its posterior inferior border, 

 produced anteriorly ; mandibles at apex bidentate, exterior angle 

 spined ; clypeus trilobed, with transverse apical whitish band ; joint 

 3 of antennae about as long as 4, 5-12 slightly diminishing in length ; 

 segments 6 and 7 of abdomen with dentiform lateral apical 

 angles C. impomoece. 



Hind claws cleft ; hind metatarsus simple ; clypeus entire 1. 



1. Joint 3 of antennse = 4 + 5 ; base of mandibles yellow, with an internal 

 tooth ; clypeus largely yellow ; segments 5 and 6 of abdomen with 

 lateral basal spines, stronger on 6 X. strenua. 



Joint 3 of antennae about one-third as long as 4, 5-12 slightly 

 diminishing in length ; mandibles tridentate, base black ; clypeus 

 with yellowish spot ; apex of abdomen without spines . . P. pruinosa. 



DESCRIPTIONS OF NORTH AMERICAN BEES. 



BY H. L. VIERECK, PHILADELPHIA, PA. 



Coelioxys Foxii, n. sp. 



Coelioxys vigilans, Fox, not Sm. Tr. Am. Ent. Soc, XVIII., 344, 

 1891, ? ( j. 



Conspicuous by its deeply-punctured thoracic dorsum and the orange 

 to yellowish pubescence. 



°. . Length, 10.5 mm. Clypeus rugose, with close, large, poorly- 

 defined punctures, covered with a fine whitish pubescence, and having a 

 whitish moustache ; sides of the face covered with a yellowish appressed 

 pubescence ; near the ocelli this becomes erect ; around the latter 

 the hairs are dark brown, and form an erect fringe ; a raised space 

 in front of anterior ocellus, tapering down in front to a point terminating 

 between insertion of antenna-, has a longitudinal impressed line along the 

 middle on its lower half, and branches up to on each side of the anterior 

 ocellus impunctate, dullish, the space between and surrounding punctured; 

 an impunctate space between lateral ocelli and eye margins ; top of the 

 head punctured, dullish, the punctures smaller than those on dorsulum, 

 almost bare ; cheeks with appressed pubescence paler than that on sides 

 of face. Dorsum of thorax with large deep punctures, shining, the punc- 

 tures on dorsulum usually well separated, those on .scuiellum sparse, a 

 narrow longitudinal area on the middle of scutellum impunctate; a semi- 

 circular collection of appressed pubescence on scutellum, a spot of 



