110 THE CANADIAN ENTOMOLOGIST. 



inner tooth the shorter ; tran. med. received basad of the middle of the 

 cell ; tran. rad. in about the middle ; sheath rather long, the lower and 

 upper margins parallel, the apex rounded, but more strongly so below ; 

 cerci robust, short. Colour black ; clvpeus, labium, mandibles, except 

 the piceous apices, palpi, lower part of the cheeks, posterior angles of the 

 pronotum, teguhe, a broad line on the mesopleune, a vertical line below 

 the posterior wings, coxsv, trochanters (there is a small spot on the 

 posterior pair above), femora, except a spot at the apex above on the 

 anterior pair, a line above on the posterior pair and the apical third, tibiae, 

 except a line above (this line is sometimes interrupted), all the tarsi (the 

 posterior pair are somewhat rufous) yellow ; a spot above the posterior 

 coxa? cream-colour ; base of the venter and the sides of the basal plates 

 reddish-yellow ; the rest of the abdomen, except the three basal, tergal 

 segments and the sheath, which are black, rufous. Wings clear hyaline, 

 somewhat iridescent ; venation rather weak, the veins and stigma brown, 

 becoming pale at the base of the wing ; the costa reddish-yellow. 



Habitat : Ute Creek, Costilla Co., Colorado, alt. 9,000 ft., June 22, 

 1907 (R. W. Dawson). Type in the University of Nebraska. 



This pretty species is quite distincc from all the other western species, 

 coming nearest to pallicolus Beulahensis, but it is quite distinct from that 

 species. It is perhaps closest to Junghannsii, MacG. (N. H.), but is 

 smaller, the first three tergal segments are black, and all the tarsi are 

 yellow. 



A female from Hot Creek, Nebr., Aug., is not typical, but evidently 

 the same. 



Tenthredo vari/rons, n. sp. 



Male : Length, 9.5 to 1 1 mm. Clypeus sub-semicircularly emargi- 

 nate, lobes somewhat variable in width, but broad and obtuse ; frontal 

 furrows distinct to occiput, the transverse furrow behind the lateral 

 ocelli wanting or only faintly indicated ; frontal carina? not reaching to 

 the anterior ocellus. Third antennal joint much longer than the fourth ; 

 the apical joint and the preceding of almost equal length ; the apical 

 joint obtuse at the apex. Furrow of the middle lobe of the mesonotum 

 distinct ; lateral lobes closely punctured, opaque; scutellum very closely 

 punctured, almost granular; postscutellum not distinctly carinated. Vena- 

 tion normal; tarsal claws cleft, teeth about equal. Colour black; civ 

 peus, labrum, cheeks, a dot between the antennae sometimes, a spot above 



