336 THE CANADIAN ENTOMOLOGIST. 



scutellum, yellow. Wings normal. Fore and middle femora beneath at 

 tip, hind femora above at tip, and all the tibiu^ outwardly, yellow. 

 Abdomen somewhat more remotely punctured than the head, feebly 

 pubescent. Dorsal segments 1-5 with yellow bands; that on third 

 interrupted at the middle, the two portions inwardly pointed; that on first 

 strongly bent forward. Sixth segment with a median hemispherical 

 yellow spot on posterior half. Seventh segment above not characteristic 

 in structure. Ventral segments with punctures very coarse and remote ; 

 second, third, and fourth, with strong yellow bands, all slightly inter- 

 rupted medially. 



Hab.— S. W. Utah. (Chas. Palm.) 



This pretty and very distinct species is as near 4-notatus as any of 

 the species of Aphilanthops, though it is as widely separated from all 

 others by the tridentate clypeus as is ^-tiotatus by the peculiar structure 

 of the last dorsal segment. 



The female of 4-fiotatus^ which has never been described, differs 

 most noticeably from the male in size, the length being about 1 1 mm. 



The North American species of the genus may be separated as 

 follows : — 

 Clypeus strongly tridentate ; ground colour throughout rufous ; meta- 



thorax without spots utahensis. 



Clypeus evenly rounded ; ground colour of at least head and thorax 

 black. 



Last dorsal segment rectangular and strongly concave ; clypeus 

 margined with yellow ; legs rufous ; metathorax with a yellow 

 spot on either side ; ground colour of three basal segments of 



abdomen rufous ^-notatus. 



Last dorsal segment pointed, strongly convex ; legs yellow and 

 black ; ground colour of abdomen black. 



Bands of abdomen broad, continuous ; clypeus yellow ; 

 metathorax with a yellow spot on either side ; size 



small laticinctus. 



Bands of abdomen, at least the first three, interrupted at 

 middle ; size large. 



Clypeus and part of face above yellow ; antennae 

 mostly rufous ; metathorax with a yellow spot on 



either side frigidus. 



Clypeus, face and antennse, black ; metathorax with- 

 out spots tanrulus. 



