ICHNEUMON-FLIES, PART 2: ACAENITINAE 571 



Type: 9 , Ithaca, N. Y., Aug. 3, 1940, J. G. Franclemont (Washing- 

 ton, USNM 63741). 



Paratypes (4d\ 21 9 ): From Manitoba (Cedar Lake and Teulon); 

 Michigan (Cheboygan, Flood wood in Dickinson Co., and Gogebic 

 Co.); Minnesota (Alexandria and Bovey); New Brunswick (Bathurst 

 and Nictau); New Hampshire (Franconia and Mount Washington); 

 New York (Ithaca, summit of Mount Whiteface, and Onteora Mt. in 

 Greene Co.); Ohio (Scioto Co.); Ontario (near Bancroft, Bobcaygeon, 

 and Sudbury); and Quebec (Alcove and Sherbrooke). 



Dates of collection are from June 3 to August 3. Most are from 

 June 21 to July 27. 



This species is in the Canadian and Transition zones of the east. 

 Most adults occur from about June 20 to the end of July. 



2. Spiiopteron formosum (Cresson), new combination 



Figure 319,j 



Front wing 11.5 to 14.5 mm. long; head about 0.97 as wide across 

 midlength of temples as across eyes; punctures on metapleurum 

 moderately large, separated by about 0.3 their diameter; scutellum 

 with lateral carina only at its base; ovipositor about 1.12 as long as 

 front wing. 



Coloration similar to that of S. franclemonti but with the following 

 differences: Yellow on temple extending usually about to top of eye 

 (in franclemonti usually ending well below top of eye); apical 13 ± 

 segments of flagellum black; yellow markings on thorax a little more 

 extensive, there being usually a yellow stripe on mesal side of lateral 

 lobe of mesoscutum and usually an irregular yellow stripe in lower 

 part of mesopleurum ; hind femur and tibia variable, according to the 

 subspecies; abdomen of both sexes, but especially of female, usually 

 more evenly and completely banded (in female usually the basal five 

 tergites or more with a complete band); subgenital plate of female 

 with a basolateral brown area; and front wing with a fuscous spot 

 over base of radius, small in male, larger in female. 



There is a northern and a southern subspecies, with color differences 

 as stated in the key: 



1. Hind femur largely or almost entirely blackish (its extreme apex whitish, its 

 base sometimes largely fulvous, and in males a broad stripe on front face 

 yellowish white); hind tibia stramineous, more or less weakly infuscate 

 except basally, at extreme apex, and often below (fig. 328,d); range: Al- 



leghanian fauna 2a. formosum formosum (Cresson) 



Hind femur fulvous, its subapical 0.2 ± blackish; hind tibia rather uniformly 

 pale fulvous (fig. 328, e); range: Carolinian and Austroriparian faunas. 



2b. formosum australe, new subspecies 



