60 - THE CANADIAN ENTOMOLOGIST 



cheeks, and tegula; in part; with the following parts black: first 

 and second and part of third antennal segment above, eyes, 

 ocelli, spot on lateral lobes, suture between mesonotum and 

 mesoscutellum, metanotum, postscutellum, middle of basal 

 plates, proximal part of metacoxae, a spot above, and saw-guides; 

 wings with veins pale brown, costa and stigma 



white. — Colorado albostigmiis Rohwer. 



dd. Frontal crest entire, not notched, large and prominent; median 

 fovea broad and shallow; ocellar basin sharply limited, walls 

 rounded; antennal segments enlarged at the distal end, the 

 third and fourth segments subequal; stigma long, the caudal 

 margin broadly convex; saw-guides retracted and concealed, 

 distal end bluntly pointed ; colour reddish-yellow with the sutures 

 of the thorax in part and the central area of the mesosternum 

 black. — Cloudcroft, New Mexico; H. L. Yiereck, 



collector vierecki, n. sp. 



cc. Head wholly black; median fovea shallow, traingular; ocellar basin 



almost wanting; antennae with the third and fourth segments 

 subequal; stigma broad, rounded on the caudal margin, broadest 

 at proximal end; saw-guides broad, apex truncate, the lower 

 margin oblique; colour reddish-yellow with the following parts 

 black: the head, antennae, spots on the lateral lobes of the meso- 

 notum, the metanotum, the pectus, the legs, and saw-guides; 

 labrum and four cephalic tibiae and tarsi brownish. — New Mexico. 



— Bred from larvae on Juniperus juniperi Rohwer, 



bb. Clypeus deeply emarginate ; stigma wholly or part yellowish hyaline ; 



antennae black above or wholly black. 

 c. Median fovea broad, comparatively deep, sides oblique; frontal 



crest strong, hardly notched ; ocellar basin a rounded depression 

 with rounded lateral walls, connecting with ccellar furrow; 

 antennal segments three and four subequal; saw-guides pointed, 

 the upper margin straight, the ventral margin slightly convex; 

 colour reddish-yellow with the sutures of the thorax in part 

 and the scutellum and the metathoracic pleurae sometimes, 

 black; the antennae blackish or brown above; coloration ex- 

 tremely variable. — New Hampshire, New York. — Larva feeds 



upon poplar americanns Marlatt. 



cc. Median fovea shallow, broad, walls sloping; frontal crest strong, 



slightly notched at middle; ocellar basin distinct, rather sharply 

 pointed above; walls somewhat rounded; stigma large, broadest 

 near the proximal end, tapering to the distal end; saw-guides 

 broad, rounded on ventral margin, a brush of setae at the distal 

 end; colour reddish-yellow; clypeus, labrum, proximal portion of 

 mandibles, posterior angles of pronotum and teguhe somewhat 

 pallid; antenna abo\-e, small spot around ocelli, a small spot 

 above each antenna, two spots on lateral lobes of mesonotum, 

 sutures of caudal part of thorax, postscutellum, metanotum, 

 middle of basal plates, proximal portion of posterior coxae, caudal 



