148 THE CANADIAN ENTOMOLOGIST. 



pleura, pectus, two lines above the posterior coxa?, and a spot on the 

 basal plates, yellow ; abdomen rufous. Legs, except a black line above, 

 yellow, the posterior tibiae are slightly reddish. Wings hyaline, iridescent; 

 venation dark brown. 



Paratypes differ in having the spot between the antenna? wanting, 

 and the yellow of the posterior tibioe replaced by rufous. 



Type locality: Florissant, Colo. Two females collected July 11, 

 1907, at flowers of Heracleum lanatum, by S. A. Rohwer. Other speci- 

 mens from : Four males, top of Las Vegas Range, N. M., alt. about 

 1 1,000 ft., June 28 (T. D. A. Cockerell) ; thirteen males, Ute Creek, 

 Costilla Co., Colo., alt. 9,000 ft., July, 1907 (L. Bruner and R. W. 

 Dawson) ; one male, Sierra Blanca, Costilla Co., Colo., alt. 10,000 to 

 11,500 ft., July 20, 1907 (L. Bruner); one male, Pike's Peak, Colo., alt. 

 10,000 ft., July 20, 1906 ( L. Bruner). 



This species is close to T. messica, Macg., but differs in having the 

 third antennal joint not twice as long as the fourth, and there is a spot 

 above the anterior coxae, and a vertical line below the posterior wing. 



Tenthredo semirubra, Norton. — What I take to be the male of this 

 species has the following characters worth noting : Length, 10 mm. 

 Clypeus almost squarely emarginate; the lobes broad, rounded. Frons 

 rather strong ; lateral ocellar furrows strong ; occiput faintly margined ; 

 interocellar furrow wanting. Third antennal joint not as long as four plus 

 five ; apical antennal joint equal in length with the preceding. Dorsulum 

 and scutelium dullish, with rather close, distinct punctures ; the scutellum 

 posteriorly with a faint carina. Stigma a little wider at the base. Inner 

 claw tooth much shorter than the outer. Black ; clypeus. labrum, 

 mandibles (apices piceous), four anterior tibiae and tarsi, yellowish-white ; 

 abdomen beyond the second segment rufous. Wings dusky hyaline ; 

 venation dark brown. 



I have six males of the above from Florissant, Colo., July 7 to 14, 

 1907, at flowers of Heracleum lanatum (S. A. Rohwer). This species was 

 known previously from Canada and Massachusetts. 



Allantus subnigriceps, n. sp. — Female: Length, 11.5 mm. Habitus 

 in general much like nigriceps, Cresson. Clypeus subsemicircularly 

 emarginate, the lobes broad, rounded at the apex ; labrum long, rounded 

 at the apex ; the clypeus and labrum shining, with a very kw punctures. 

 Interocellar furrow almost wanting ; lateral ocellar furrows obsolete below 



