No. 2312. NEW NORTH AMERICAN UYMENOPTERA—ROHWER. 211 



White pine, and emerged June 26, 1917, and are recorded under No. 

 669 Connecticut Agricultural Experiment Station. The other fe- 

 males were collected in June and July, 1915. 



Type, Allotype, and four female Paratypes. — Cat. No. 21605, 

 U.S.N.M. 



Three female paratypes and the male paratype returned to the 

 Connecticut Agricultural Experiment Station. 



Superfamily TENTHREDINOIDEA. 

 Family ARGIDAE. 



ARGE MOCSARYI, new name. 



Arge apicalis Mocsary, Anal. Miis. Nat. Hung., vol. 7, 1909, p. 6; not {Eylo- 

 loma) Arge apicalis Kirby, 1894. 



Family TENTHREDINIDAE. 



PERICLISTA PLESIA, new species. 



This species is very close to carycola (Dyar), but the sheath is 

 obliquely truncate and then broadly rounded to the base; the clypeus 

 has a broad subangulate emargination and the fourth antennal joint 

 is subequal in length to the fifth. 



Female. — Length 5.5 mm. Clypeus broadly subangulately emar- 

 ginate, the lobes broad and rounded on the lateral margins; suprac- 

 lypeal area gently convex, shining; middle fovea circular in outline, 

 deep v/ith sloping v/alls; frontal foveae small, elongate; ocellar basin 

 reduced to a triangular depression around the anterior ocellus from 

 which it projects posteriorly to the postocellar furrow; antennal 

 furrows obsolete between the frontal foveae and the postocellar fur- 

 row ; postocellar f urrovf well defined ; postocellar area convex, faintly 

 impressed medianly, well defined laterally; third antennal joint a 

 little shorter than the fourth and fifth joints; the fourth and fifth 

 joints subequal; vertex and mesepisternum shining; stigma three 

 times as long as its greatest width, obliquely truncate apically ; petiole 

 of the anellan cell rather long; sheath straight above, pointed at the 

 tip, oblicj[uely truncate and then rounded to the base. Black ; clypeus, 

 labrum, margin of the pronotum, and tegulae, yellowish-white; 

 margin of the prescutum, posterior margin of the scutum, scutellum, 

 anterior part of the pronotum, upper haK of the mesepisternum, all 

 of the legs except the extreme bases of the coxae, sternites except 

 the middle of the five basal (narrow on the first to broader on the 

 fifth) ruf o-f erruginous ; wings hyaline, venation brown, costa and 

 stigma whitish. 



Type locality. — Portland, Connecticut. Described from the fe- 

 male collected on v^'hite pine on May 15, 1914, by B. H. Walden. 



Type.—C&t. No. 21697, U.S.N.M. 



