FAUNA OF PENIKESE ISLAND. 35 



Ccelambus in&qualis Fabricius; Pond i-B; six specimens. 

 Deronectes depressus Fabricius; Pond i-B; ten specimens. 

 Dytiscus fasciventris Say ; Pond i-C; two specimens. 

 Hydrophilus obtusatus (Say); Pond i-B; one specimen. 

 Haliplus ruficollis DeGeer; Pond 2-B; eighteen specimens. 

 Hydroporus americanus Aube; Pond i-B; three specimens. 

 Hydroporus modestus Aube ; Pond 2-B ; twelve specimens. 

 Hydroporus niger Say; Pond i-B; fourteen specimens. 

 Hydroporus proximus Aube; Pond i-B; two specimens. 

 Hydroporus stagnalis G. & H.; Pond i~B; seventeen specimens. 

 Hydroporus tenebrosus Lecepede; Pond i-B; one specimen. 

 Hydroporus undulatiis Say; Pond i-B; twenty specimens. 

 Octhebius foveicollis Lecepede; Pond 2-D; two specimens. 

 Philhydrus cinctus Say; Pond 2-D; fifty specimens. 

 Philhydrus nebulosus Say; Pond i-D; one specimen. 

 Rhantus binotatus Harris; Pond i-D; two specimens. 

 Rhantus bistriatus Bergst.; Pond i-B; one specimen. 

 Thermonectes basilaris Harris; Pond i-D; two specimens. 

 Tropisternus glaber Herbst; Pond 2-B; six specimens. 

 Tropisternus nimbatus Say; Pond i-C; one specimen. 



Hymenoptera. 

 (Identification by C. W. Johnson, Boston Society 



of Natural History.) 

 Ichneumonidae. 



Therion morio Fabr. 



Formididae. 1 



Myrmica scabrinodis Nyl. subsp. schencki Emery var. emeryana 



Forel. 



Lasius niger Linn. var. americanus Emery. 

 Lasius (Chthonolasius] brevicornis Emery. 



Halictidae. 



Halictus provancheri Cress? 



Megachilidas. 



Osmia lignaria Say. 



Apidae. 



Bombus fervidus Fabr. 



1 Identified for the Boston Society of Natural History by Dr. W. M. Wheeler. 



