AET. 1. NORTH AMERICAN SAWFLIES ROHWER. 31 



at vertex and another on side covering the eye and reaching to the 

 back of head; head shining, pilose; mouth brown, widfh 1 mm.; 

 dorsal region of body olivaceous blackish; joint second anteriorly" 

 subventral region,^'' venter, feet, and joint thirteen" posteriorly 

 translucent whitish, not shiny; body pilose, the hairs arising from 

 thickly placed pale tubercles on each of the three annulets; hairs 

 rather short and pale. 



Cocoon. — Double, made of white or brownish silk, large and re- 

 sembling thin paper. 



Host. — Alnus, species. 



PRIOPHORUS MONTANUS Rohwer, new species. 



Closely allied to soUtaris (Dyar), but is somewhat larger and more 

 robust and the middle fovea is practically obsolete. 



Female. — Length, 5.5 mm. ; length of antenna about 3.75 mm. 

 Clypeus rather distinctly convex medianly, the apical margin broadly 

 acruately emarginate, not depressed; suprarcylpeal foveae large, 

 deep ; middle fovea very shallow and indistinctly defined, practically 

 obsolete, not breaking through the crest; ocellar basin obsolete 

 dorsally, the lower wall very poorly defined, rounded; a very 

 small U-shaped depression in front of the anterior ocellus ; antennal 

 furrows obsolete ; postocellar area without a pit in the anterior mid- 

 dle, distinctly limited laterally by the nearly complete vertical fur- 

 rows; postocellar furrow wanting; postocellar line distinctly longer 

 than the ocellocular line, but not quite twice as long as the ocelloc- 

 cipital line; antenna rather long, slender, distinctly tapering api- 

 cally, the third and fourth joints subequal in length; stigma rather 

 large, angled near base then rapidly tapering to apex, about two and 

 one-third times as long as greatest width; first intercubitus obso- 

 lescent ; first abscissa of radius longer than the second and subequal 

 in length with the third ; second abscissa of radius not quite twice as 

 long as the third intercubitus ; radiellan cell closed and with a short 

 appendage; recurrentella distinctly antef ureal; sheath broad, 

 rounded apically. Black; tegulae brownish; apical joints of palpi, 

 tibiae and tarsi except the infuscate apical joints (posterior ones 

 more broadly) and hind trochanters, yellowish; wings uniformly 

 dusky hyaline ; venation brown, except the costa and base of cubitus 

 which are pale brown. 



Type locality. — Belgrade, Montana. 



Described from three females (one type) collected July 14, 1909, 

 and sent in under number 228 by an unknown collector. 



Type.— C2.i. No. 23558, U.S.N.M. 



" Mesothorax. 



" Eplpleural, pleural, and hypopleural regions. 



" Urlte nine. 



3136— 22— Proc.N.M.Vol.60 4 



