ICHNEUMONIDAE 939 



Megarhyssa Ashmead 

 (The species of this genus are parasitic on horntails of the genus Tremex.) 



M. atrata (Fab.). Axton, Je, M&H (Ashm-CU) ; Raquette R. (Lint) ; Ithaca, Je-Jl 

 (CU) ; Spencer, Je (Cush-CU) ; Taughannock, May, Bdy (Cush-CU) ; Tren- 

 ton Falls, Leon,Fbs (Cush-CU) ; Livingston (Clarkson) ; Albany, Je (Lint- 

 NYS); Menands, Jl, Mattimore (Lint-NYS) ; SI (Ashm) ; LI (Roh-US). 

 Common probably everywhere in the State. 



M. greenei Vier. Cranberry L., Jl, Htly (Cush-NYS Col. For.) ; Ithaca, Je, Aug 



(Cush-CU) ; Ft. Montgomery, Je (Cush-Schott). Parasitic on larva of 

 Tremex cohimha (L.). 



M. lunator (Fab.). Wilmington, Aug, 1000-2000 ft. (Cush-CU); Rochester Jet., 

 Je, Leon (Cush-CU) ; Castile, EABradley (Bdy) ; Portageville, Je (Cush- 

 CU) ; Schuyler Co, Aug, Burner (Roh-US) ; Meridian, Williams (Lint- 

 NYS) ; Taughannock, May (Cush-CU) ; Ithaca, May- Aug (Cush-CU) ; El- 

 mira, Sep, Diven (Cush-CU) ; Albany, Sep {Lint) ; Loudonville (Felt) ; 

 Livingston (Clarkson) ; Port Chester, Jl, Sample (Roh-US) ; SI (Ashm). 

 Common probably everywhere in the State. Parasitic on larva of Tremex 

 columba (L.). 



Tribe ACOENITINI i^e 



COLEOCENTRUS Gravenhorst 



(Very little is known of the host relations of this genus, but the species are 

 probably parasitic on the larvae of wood-boring Coleoptera.) 



C. harringtoni Cush. Ithaca, Jl (Cush-CU) ; LI: Rockaway (AM). 

 C. pettitii Cress. Cranberry L., Je, Htly (Cush-NYS Col. For.). 

 C. rufus Prov. Johnstown, Ap, Poughkeepsie, Je, Yg (NYS). 



C. similis Cush. Cranberry L., Je, Gray (Cush-CU) ; Buck I., Je, Htly (Cush-US) ; 

 Ithaca, May-Je (Cush-CU) ; Ft. Montgomery, Je, Schott (Cush-CU). 



Arotes Gravenhorst 



A. amoenus Cress. Mt. Whiteface, 4872 ft., Jl, Aid (Cush-US) ; Cranberry L., 

 Je, Htly (Cush-NYS Col. For.) ; Labrador L., Je (Cush-CU) ; Batavia, Je 

 (Cush-CU) ; Ithaca, Je (Mues-CU) ; Caroline to Harford, Je, MacG&Bdy 

 (Mues-CU) ; Trenton Falls, Je, Leon&Fbs (Cush-CU) ; Ft. Montgomery, Je, 

 Schott (Cush-US) ; LI: E. Hampton, Je (Mues-CU) ; Gardiners I., Je 

 (Schott). 



A. decorus (Say). Albany, Aug (NYS) ; Poughkeepsie, Je (NYS) ; Bronx Pk. 

 (Ashm). Recorded as a parasite of Xylotrechus colonus (Fab.) (Cerambyc- 

 idae), and Tomoxia bidentata (Say) (Mordellidae). 



A. occiputalis Cress, (apicatus Ds.). LI: Cold Sp. Harb., Jl (Cush-CU). 

 Recorded as a parasite of Ophistomis bicolor (Swed.). 



A. vicinus Cress. New Russia, Aug, Bdy (Mues-CU) ; Long L., Aug (NYS) ; 

 Ithaca, Jl (NYS). Recorded as a parasite of Strangalepta vittata (Oliv.), 

 Brachyleptura rubrica (Say), and B. vagans (Oliv.) (all Cerambycidae). 



-^^ The North American ichneumon-flies of the tribe Acoenitini. By Robert A. Cushman and 

 S. A. Rohwer. Proc. U.S. Nat. Mus., 1920. 57: 503-523. 



