No. 2320. TRIBE ACOENITINI—CUSHMAN AND BOHWEB. 519 



come from Virginia and Georgia. The national collection contains 

 specimens from Cadet, Missouri; Milwaukee County, Wisconsin; 

 Harrisburg and Linglestown, Pennsylvania (W. S. Fisher). 



Hosts. — Felt ^ records this species as a parasite of Xylotrechus colo- 

 nus Fabricius, and W. S. Fisher has reared it as a parasite of Tomoxia 

 hidentata Say. 



AROTES FORMOSUS Cresson. 



Arotes formosus Cresson, Can. Ent., vol. 1, 1868, p. 34. 



Type a single male. Cat. No. 1435, Acad. Nat. Sci., Philadelphia. 



This species although closely allied to amoenus is easUy distin- 

 guished by the characters mentioned in the above key. Recurrent 

 interstitial; ovipositor subequal in length with the body; wings hya- 

 line with apical margin dusky; stigma black; notauli foveolate* 

 antennae with a broad annulus. 



Cresson's type came from Ottawa, Canada; there are two females 

 from Massachusetts in the Academy of Natural Sciences of Phila- 

 delphia; and the National Collection has females from Sherbrook, 

 Canada, and Floodwood, Schoolcraft County, Michigan (F. M. Gaige) ; 

 and males from Clark's Valley, Dauphin, Pennsylvania, collected 

 June 5, 1919, by Kirk and Champlain. 



AROTES AMOENUS Cressoi*. 



Arotes amoenus Cresson, Can. Ent., vol. 1, 1868, p. 34. 

 Tropistes elegans Provancher, Nat. Can., vol. 6, 1874, p. 80. 



Type of amoenus Cat. No. 1434, Academy of Natural Sciences, Phila- 

 delphia. Type of elegans either lost or in Public Museum of Quebec 

 under name label amoenus. 



This is the commonest species of Arotes occurring in our fauna. 

 The position of the recurrent in relation to the intercubitus is subject 

 to considerable variation. It is often different in the two wings of 

 the same specimen and varies from antefurcal by the length of the 

 intercubitus to interstitial. The areolation of the propodeum is also 

 subject to considerable variation, as the areola and basal area may 

 each be either longer than wide or wider than long, and all inter- 

 mediate conditions exist. The color is, however, fairly constant and 

 the species should easily be recognized by the above key. 



Distribution. — Specimens in the collection of the Academy of Nat- 

 ural Science of Philadelphia come from Canada, Virginia, Massachu- 

 setts, and Pennsylvania, while the National Collection contains speci- 

 mens from the following localities : Sherbrook, Canada ; Capens, Maine ; 

 Durham, New Hampshire (Weed and Fiske); east Massachusetts; 

 Savoy, Massachusetts (W. E. Britton); Nassau (Bowditch), East 

 River (C. R. Ely), Connecticut; New York; Pennsylvania; Castle 

 Rock and Overbrook (G. M. Greene), Pennsylvania; Laurel (E. B. 



1 Forest and Shade Tree Insects of New York, vol. 1, 1903, p. 261. 



