THE CANADIAN ENTOMOLOGIST. 1+7 



Tenthredo hypoleuca, n. sp. — Male : Length, 9 mm. Clypeus semi- 

 circularly emarginate, the lobes broad, rounded. Eyes distinctly con- 

 verging below, yet not strongly so. Occiput margined ; frons strong ; 

 lateral ocellar furrows distinct, opposite the lateral ocelli they broaden 

 slightly, then narrow again, interocellar furrow faint. Antennal joint 

 somewhat nodose at the apex ; joint three not quite as long as joint four 

 plus five. Head shining ; dorsulum and scutellum shining, with separate 

 distinct punctures ; postscutellum rough, slightly carinated. Inner claw 

 tooth about the same length as the outer. Lower margin of the stigma 

 almost straight ; venation normal Black, white and rufous. Clypeus, 

 labrum, mandibles (the apices piceous), spot at lower corner of eyes, palpi, 

 posterior angles of the pronotum, tegulae, the lower half of the pleura and 

 pectus, a spot on the basal plates, white. Abdomen beyond the first seg- 

 ment rufous, the venter somewhat whitish. Legs : coxae, trochanters, four 

 anterior femora, tibiae and tarsi, except a black line above, white ; posterior 

 femora and the posterior tibiae beneath rufous ; the rest of the legs black. 

 Wings hyaline, iridescent ; venation dark brown. 



Type locality : Florissant, Colo. The type collected July 11, 1907, 

 at flowers of Heradeum lanatum, and a paratype swept from the meadow, 

 July 7, 1907, by S. A. Rohwer. 



This species resembles T. Slossoni, Macg., but the clypeus is semi- 

 circularly emarginate, the intermediate femora are not rufous, the markings 

 white, etc. It is also related to T. signatus, Nort., but the antennae are 

 not pale beneath, the white of the pleura? and the pectus are confluent, 

 etc. 



Tenthredo mess ica/or mis, n. sp. — Male : Length, 9 mm. Clypeus 

 semicircularly emarginate, the lobes rather narrow, rounded. The occiput 

 margined : frons strong ; lateral ocellar furrows well defined ; interocellar 

 furrow present but faint. Antennae simple, tapering to the apex ; joint 

 not as long as joints four plus five ; apical joint a little shorter than the 

 preceding one. Head shining \ dorsulum and the scutellum rather 

 coarsely granular; postscutellum granular and carinated. Teeth of the 

 claws about equal. Stigma almost straight on the lower margin; venation 

 normal, Black, yellow and rufous. Clypeus, labrum, mandibles (the 

 apices piceous), spot between the antennae beneath, a small spot above 

 each antenna, cheeks below the middle of the eyes, posterior angle of the 

 pronotum, tegulse, lower angle of the prothorax, a broad line on the 



