THE CANADIAN ENTOMOLOGIST. 345 



A NEW GENUS AND SOME NEW SPECIES OF 

 TENTHREDINIDJE. 



BY ALEX. D. MACGILLIVRAY, ITHACA, N. Y. 



Phlebatrophia, n. gen. 



Antennae with more than ten segments ; front wings with the radial 

 cross-vein, the radio medial cross-vein, and the free parts of R 4 and R 5 

 present; the medio-cnbital cross-vein and the free part of M 3 u strongly 

 divergent behind ; the radial sector atrophied adjacent to the stigma ; the 

 free pait of M^ + Cii! arising near the middle of the cell M 4 ; the first and 

 second anal cells present and separated by the free part of 2nd A ; the 

 hind wings with the vein forming the front margin of the cell Rj , , atrophied ; 

 the free part of R 4 and the transverse part of M^ wanting, and therefore 

 without middle cells ; the anal cells petiolated for one-third their length ; 

 the tarsal claws cleft at apex and appendiculately toothed at base. Type 

 Phlebatrophia Mathesoni, n. sp. 



This genus will fall next to Phyllotoma, Fallen, from which it is 

 readily separated by the atrophy of the base of the radial sector, a 

 character which, so far as I am aware, does not occur elsewhere in the 

 family Tenthredinidae. If Herr Snellen van Vollenhoven's figure be 

 correct, Phyllotoma nemorata, Fall., would have to be referred to this 

 genus. 



Phlebatrophia Mathesoni, n. sp. — Body black, widi the inner orbits, 

 the malar spaces, a spot above the base of each antenna, the hypoclypeal 

 area, the clypeus, the labrum, the tegulae, the collar and extending onto 

 the sides below the tegulae the legs beyond the coxae, except the femora, 

 which are pale at base and apex, and these areas frequently joined by a 

 narrow band along the upper anterior margin, in some individuals ex- 

 panding until it covers a half or more of the femora, and the posterior 

 margin of the abdominal segments at sides, yellow or whitish ; the 

 antenna? with ten segments, the tenth transversely marked and an eleventh 

 faintly indicated, the third segment distinctly longer than the fourth ; the 

 clypeus appearing six-sided, longest transversly, truncate at apex ; the 

 labrum broadly rounded at the apex ; the hypoclypeal area fiat, quad- 

 rangular, longer than broad ; the middle fovea deep, extending from the 

 hypoclypeal area to, and surrounding, the anterior ocellus ; the antennal 

 furrows distinct as far as the lateral ocelli ; the postocular area elevated, 

 short, three or four times, as broad as long, and bounded in front by an 



October, 19^9 



