ABT. 1. NORTH AMERICAN SAWFLIES ROHWER. 27 



Described from one female reared from a larva collected on Cra- 

 taegus by Chas. R. Ely, and recorded under Bureau of Entomology 

 Number, Hopk. U. S. 13649^. 



Type.—C2ii. No. 21587, U.S.N.M. 



Larva. — Length 10 mm. similar to and with apparently no char- 

 acters distingushing it from that of P. pruni Rohwer. All the 

 larvae examined were quite dark, blackish along the dorsum. 



Host. — Crataegus, species. 



Seasonal History. — Larvae, collected in early July, became pre- 

 pupae and spun cocoons by the twenty-seventh, from which adults 

 had emerged August third. 



PRIOPHORUS BETULAE Rohwer, new (pedes. 



Figure 51. 



Female. — Length 3.5 mm,; length of the antenna about 3 mm. 

 Clypeus shining, almost without punctures, not strongly convex 

 basally, the anterior margin rather deeply, arculately emarginate, 

 the lobes nearly triangular in outline; supraclypeal foveae deep, 

 punctiform; middle fovea shallow, wedge-shaped in outline; anten- 

 nal furrows poorly defined along the ocelli; ocellar basin obsolete 

 laterally, the lower wall rounded, broken; a distinct triangular de- 

 pression in front of the anterior ocellus; postocellar area sharply 

 defined laterally, convex, without foveae; postocellar furrow want- 

 ing; postocellar line subequal with the ocellocular line; antenna 

 rather short, not sharply tapering, the third joint distinctly shorter 

 than the fourth, the apical joint slightly shorter than the preceding; 

 stigma rounded below, obliquely truncate apically; first intercubitus 

 obsolescent; the third cubital on the radius distinctly shorter than 

 the second; radiellan cell with a very short appendage; sheath ob- 

 tusely pointed apically, straight above, tapering to a broad base. 

 Black; the four anterior tibiae and tarsi (the apical joints of the 

 intermediate tarsi are infuscated), and the basal two-thirds of the 

 posterior tibiae white; wings strongly brownish, subhyaline beyond 

 the apex of the stigma. 



Male. — Length 4.5 mm. ; length of the antenna 3.5 mm. In struc- 

 ture and color the above description of the female applies well to the 

 male, except the middle fovea is smaller with more sharply sloping 

 walls and the radiellan cell is entirely without an apendage ; hypopy- 

 gidium broadly rounded apically; antenna very hairy, the third 

 joint considerably shorter than the fourth, concave below and very 

 faintly produced basally so it is fully as broad at the base as the 

 pedicel, the entire joint one-fifth broader than the fourth; the apical 

 joint distinctly shorter than the preceding. 



Type locality. — East River, Connecticut. 



