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



°P. ostryae (Marlatt). Pteronus ostry<s 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 siniilaris Norton. 

 Nematus rohinicB 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 'M.dL.r\2itt. 



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

 feeds on white oak. 



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

 feeds on white birch. 



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

 vertehratus 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 mpnochromus 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 Mdivlatt 



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



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

 Larva feeds on Lombardy poplar. 



