136 CONNECTICUT GEOL. AND NAT, HIST. SURVEY. [Bull. 



°P. ostryae (Marlatt). Pteronus ostrya Marlatt. 



°P. odorata (Dyar). Nematus salicis odoratus Dyar. 

 Pteronus odoratus Dyar. Larva feeds on willow. 



°P, cornelli (Marlatt). Pteronus cornelli Marlatt. 

 P. trilineata (Norton). Nematus trilineatus Norton. 

 Pteronus trilineatus Norton. Nematus similaris Norton. 

 Nematus robinice Forbes. Howard, Insect Book, PI. xiv. Fig. 

 28. Larva feeds on locust. Farmington (E. N.) ; New Haven, 

 22 May, 1908 (B. H. W.). 



° P. magna (Marlatt). Pteronus magnus Marlatt. 



°P. quercus (Marlatt). Pteronus guerciis Marlatt. Larva 

 feeds on white oak. 



°P. hyalina (Marlatt). Pteronus hyalinus Marlatt. Larva 

 feeds on white birch. 



°P. vertebrata (Say). Nematus vertebratus Say. Pteronus 

 vertebratus Say. Nematus dorsivittatus Cresson. Larva feeds 

 on willow and poplar. 



P. Integra (Say). Nematus integer Say. Pteronus integer 

 Say. Larva feeds on black oak. Connecticut (E. N.) ; New 

 Haven. 



°P. monochroma (Norton). Nematus monochromus Norton. 



°P. stigmata (Norton). Nematus stigmatus Norton. 

 P. mendica (Walsh). Nematus mendicus Walsh. Pteronus 

 mendicus Walsh. Nematus trivittatus Norton. Larva feeds on 

 willow. New Haven, 4 May, 1904, 19 April, 1910 (H. L. V., 

 VanDuzee, B. H. W.) ; Wallingford, 14 June, 1911 (J. K. 

 Lewis). 



°P. pinguidorsum (Dyar). Nematus pinguidorsum Dyar. 

 Pteronus pinguidorsum Dyar, Larva feeds on birch. 



°P. longicornis (Marlatt). Pteronus longicornis Marlatt. 



°P. dubia (Marlatt). Pteronus dubius Marlatt. 



''P. lombardae (Marlatt). Pteronus lombardce Marlatt. 

 Larva feeds on Lombardy poplar. 



