352 THE CANADIAN ENTOMOLOGIST. 



Family Pteromalidce. 

 Subfamily Pteromalinae. 

 Tribe Pteromalini. 

 Genus Ai-throlytus 

 (Type Arihrolytiis piinciattis Thomson). 

 rtero7nalus Swedeius (partim). 

 Thomson, 1878, pd. 147, 158. — Subgenus Ai'throlyius. 

 Howard, 1886, pp. 2i'^^ 97. — Subgenus Arthrolytiis. 

 Cresson, 1887, PP- 77? M^- — Subgenus Arthrolytiis. 

 Ashmead, 1893, j). 162. — Genus Arthrolytiis. 

 De D.iUa Torre, 1898, p. 153 — Genus Arthrolytiis. 

 Ashmead, 1Q04, pp. 320, 322, 367. — Genus Arthrolytiis. 

 Schmiedeknecht, 1907, p. 479 — Gqxwxs Arthrolytiis. 

 Idem, 1909, pp. 329, 331, 358-359.— Genus Arthrolytiis. 



Descriptions of the Species. 

 I. Arthrolytiis pwictatiis Thomson. 

 Thomson, 1878, pp. 158-159. 

 Ashmead, 1894, p. 339. 

 De Dalla Torre, 1898, p. 155. 

 Ashmead, 1904, pp. 320, 367. 

 Schmiedeknecht, 1909, p. 359. 

 " I. A. punctattis m : Obscure ^neus, antennis basi pedibusque 

 rufescentibus, alis ^ macula magna disci fumata. Long., 3-4 mill. 

 " Pteronialus maculipennis Walk,, 1. c. Ill, 191, Z-^ (forte). 

 "Caput thorace fere latius, subtransversum, antrorsum vix angustatum, 

 pone oculos magnos ovatos subangustatum, vertice minus lato, ocellis 

 })arvulis in Imeam curvam dispositis ; facie convexa, fortiter concinne 

 punctata, scrobe antennali parum impressa ; clypeo vix discreto, sinu 

 laterali parvo, apice medio truncato, genis parum buccatis haud com- 

 pressis ; mandibulis 4-dentatis, dente apicali parum forcipato. Antennas 

 infra medium, faciei insertae ; articulo \o testaceo, ocellum haud 

 attingente, 20 longo sed postannello breviore, annellis haud parvis sed 

 flagello arete adpressis, 5-10 sensim brevioribus et paullo crassioribus 50 

 basin versus attenuato longo quam 100 transverso multo longiore, clava 

 parva postannello breviore, apice oblique acuminata. Thorax satcrassus, 

 supra convexus, obscure olivaceo-?eneus, fortiter concinne punctatus, 

 subglaber ; pronoto haud plane verlicali, collar!''^ haud discreto ; meta- 



a. Beg-inning- p. 159. 



