THE CANADIAN ENTOMOLOGIST. 11 



apex of abdomen with rather long hair. Colour rugo-ferruginous ; head, 

 antennae, scutellum, metathorax (including basal plates, usually), meso- 

 pleura and pectus, legs, two apical segments of abdomen and sheath, 

 black ; wings smoky-hyaline, nervures and stigma black ; head and thorax 

 with white pile. 



Habitat. — Three 9 ; s, Florissant, Colo., June and July, 1907, on 

 foliage of Salix brachycarpa ; 9, Boulder, Colo., May 12, 1907, on 

 foliage of Salix lutcosencea (S. A. Rohwer) ; 9 , Doleres, Colo.; 9 , 

 Silverton, Colo., June 20, 1S92 (C. P. Gillette); 12 9 ' s > Ute Creek, 

 Costilla Co., Colo., 9,000 ft., June and July, 1907 (H. S. Smith, L. Bruner, 

 R. W. Dawson); 9, Ft. Garland, Colo., July 12, 1907 (L. Bruner). 



In some specimens there is a black spot on anterior lobe of meso- 

 notum. The basal plates are sometimes rufous. The wings vary some- 

 what in smokiness. 



I had confused this with similis, Nort., but it is quite distinct, easily 

 separated by these characters : The rufous lateral lobes of mesonotum, 

 entirely black legs, having the mesonotum more closely punctured. 



Dolerus Coloradensis, Cress — I have seen 6 J 's from Ute Creek, 

 Costilla Co., Colo., 9,000 ft, Jul)' 9 to 23, 1907 (L. Bruner and R. VV. 

 Dawson), which I have called the male of Coloradensis. It may be briefly 

 described as follows : Length, 9 mm.; structure as in 9 > black ; first 

 five abdominal segments rufous ; wings rather daik. I have seen 9 ' s 0I " 

 this species from the above locality, Larimer Co., Colo., and Halself, 

 Nebraska, June. The last has the clypeus rufous. Specimens in the 

 Colorado Agricultural College collection, determined by Mr. Harrington 

 as D. tejouensis, Nort., are D. Coloradensis, Cress., so Mr. Weldon's 

 record of tejouensis from Colorado is a mistake (Can. Ent., Sept. 1, 1907). 



Scutellum black ; sides of mesopleura above rufous ; cerci black ; scutellum 

 with a good many punctures ; claw-tooth blunt ; wings not at all 

 yellowish , Coloradensis, Cress. 



Scutellum rufous ; mesopleura black ; cerci rufous ; scutellum almost 

 without punctures ; claw-tooth sharp ; wings somewhat 

 yellowish tejouensis, Nort. 



Schizocerus Nortoni, n. sp. — £ . Length, 53^ mm.; length of 

 anterior wing, 5 mm. Robust. Head narrower than thorax, not very 

 strongly transverse; eyes prominent, shining, impunctate ; ocelli in a low 

 triangle, distance between the two lateral ocelli about equ;d to the distance 

 to the nearest eye margin ; frontal furrows indistinct ; ocollar basin almost 



