I36 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



C P. ostryae (Marlatt). Pteronus ostryce 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 quercus Marlatt. Larva 

 feeds on white oak. 



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

 feeds on white birch. 



C 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 

 wendicus 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, 191 1 (J. K. 

 Lewis). 



P. pinguidorsum (Dyar). Nematus pinguidorsum Dyar. 

 Pteronus pinguidorsum Dyar. Larva feeds on birch. 



P. longicornis (Marlatt). Pteronus longicomis Marlatt. 



P. dubia (Marlatt). Pteronus dubius Marlatt. 



P. lombardae (Marlatt). Pteronus lombardce Marlatt. 

 Larva feeds on Lombardy poplar. 



