Oct., '04] ENTOMOLOGICAL NEWS. 26 1 



EXPLANATION OF PLATE XVII. 

 Fig. i. Xysticus modes/us, dorsal view of female. 

 " 2. Phidippus ferrugineus, dorsal view of female. 

 "3.- " side view. 



" 4. Araneus singesformis, dorsal view of female. 

 " 5. ventral view. 



" 6. epigdnum. 



" 7. Lycosa wacondatia, dorsal view of female. 



The American Genera of the Bee Family Dufoureidae. 

 BY HENRY L,. VIERECK. 



As defined by Robertson, Can. Ent. xxxvi., p. 37, this family 

 constitutes a compact group of genera in the old Panurgidae. 



Labial palpi with the first joint distinctly longer than the next three, second 

 joint at least one-third as long as the first joint ; posterior 

 femora in the male laminate ; abdomen not toothed. 



Neohalictoides n. g., type N. (H.) maurus Cress. 



Labial palpi with the first joint distinctly shorter than the other three, 

 second joint about three-fourths the length of the first joint. 



Legs ordinary Epihalictoides Ckll. ^ 



Legs elaborately produced into spines and angles. 



Cryptohalictoides n. g., type C. spiniferus n. sp. ' 



Labial palpi with the first joint rather shorter than the next three joints 

 together, the second joint about one-half the length of the first 



joint Parahalictoides Ckll. 



Labial palpi with the first joint about one mm. shorter than the next three 

 joints together, the second joint about two-thirds the length 

 of the first joint or a little shorter ; head narrow, distinctly 

 longer than broad ; male with a pointed tubercle on the poste- 

 rior trochanters . . Conohalictoides n. g., type C. lovelli Yier. 



Cryptohalictoides spiniferus n. g. n. sp. 



<j\ ii mm. long. Head. Front closely and finely punctured, frontal 

 impression represented by a faint impressed line, above the insertion of 

 each antenna is an oval impression ; vertex with the punctures larger 

 than on the front and scattered, closest back of the ocelli ; cheeks if any- 

 thing a little broader than the eye, punctured like the front ; distance 

 between posterior ocelli a little less than the distance between the lateral 

 ocellus and the nearest eye margin ; clypeus closely punctured nearly 

 hidden by the hairs hanging over it, apparently smaller than the labrum ; 

 labrum convex, smooth, somewhat longitudinally striated, punctured on 

 the lower margin ; mandibles with a short blunt tooth not far from the 

 apex ; scape about as long as the second joint of the flagellum. pedicel- 

 luni distinctly shorter than joint one of the flagellum, the pedicellum ami 

 the first joint of the flagelliim together shorter than the second joint of the 



