Possibly a Hyperparasite. Several species of hymenopterous pri- 

 mary parasites reared from above hosts. 



Tetrastichus modestus How. § 



Host: Pyrauftta iutilalis (Led.). 



Locality: Atkinson, N. H. 



Adults: September. 



Number per host: Not recorded. 



Generations: At least two. 



Hyperparasite on Apanteles pyraustae Vier. 



Tetrastichus n. sp. (?) § 



Host: Laspeyresia youngana (Kearf.). 

 Locality: Groton, Vt. 

 Adults: June and July. 

 Number per host : One. 

 Generations: Unknown. 

 Hyperparasite on Campoplex sp. 



Tetrastichus sp. 



Host: Coleophora laricella Hbn. 



Localities: Sidney, Maine; Arlington, Mass.; and Somerville, N. J. 



Adults: May. 



Number per host: One. 



Generations: Two or more. 



Hibernation: On the larval case of host. 



Tetrastichus sp. 



Host: Exoteleia pinifoliella (Chamb.). 

 Localities: Plymouth and Sherborn, Mass. 

 Adults: Late in June. 

 Number per host: One. 

 Generations: Unknown. 



Tetrastichus turionum (Htg.) 



Host: Rhyacionia huoliana (Schiff.). 



Locality: Matinecock, N. Y. 



Adults: May. 



Number per host: Gregarious; an average of 20 per host. 



Generations: One. 



Hibernation: As full grown larvae in host pupa. 



Testrastichus varicornis (Grit.) 



Hosts: Epinotia nanana (Treits.), Bhyacionia jrustrana (Comst.). 

 Localities: Boothbay, Harpswell, Newagen, Southport, Maine; and 

 Nantucket, Mass. 



Adults : Late in May and June. 

 Number per host: One. 

 Generations: Unknown. 



Tetrastichus xanthops (Ratz.) 



Host: Coleophora laricella Hbn. 



LocaUty: Mehose, Mass. 



Adults: June. 



Number per host: Gregarious (two or three individuals). 



Generations: Multibrooded. 



Hibernation: On host larval mine of Phyllotoma nemorata (Fall.). 



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