ICHNEUMON-FLIES, PART 2 1 EPHIALTTNAE 



215 



2. Perithous divinator (Rossi) 



Figures 322,k; 331,f 



Ichneumon divinator Rossi, 1790, Fauna Etrusca, vol. 2, p. 48; ?. Type: 9, 

 province of Firenze or of Pisa, Italy (location unknown). 



Front wing 6.1 to 6.6 mm. long in male, 5.8 to 8 mm. long in female; 

 body form rather stout; male flagellum without tyloids; second seg- 

 ment of middle tarsus about 3.7 as long as wide; second tergite about 

 1.10 as long as wide in male, about 1.05 as long as wide in female; 

 ramellus usually long, especially in female; ovipositor sheath about 

 1.0 as long as front wing; lower valve of ovipositor with about 14 

 ridgelike teeth, the apical tooth-bearing part of the valve about 2.6 

 as long as deep. 



Colored almost exactly like P. mediator mediator (a European 

 subspecies) and rather similar to the two Nearctic subspecies of 

 P. mediator, differing from one or both of them as follows : mesoscutum 

 always entirely ferruginous except for blackish lateral edges ; mesepi- 

 sternum entirely ferruginous except that the subtegular ridge is white 

 and its upper hind corner is infuscate; hind femur fulvous with its 

 extreme base brown and extreme apex whitish; hind tibia and tarsus 

 of male with the pale areas whitish stramineous and the dark areas 

 dark brown (and thus a little less contrasting than in the American 

 forms of P. mediator) ; and tibiae and tarsi of female ferruginous, the 

 hind tibia and tarsus tinged with brown. 



Figure 90. — Localities for 

 Perithous divinator. 



Specimens (6d\ 269) : From Connecticut (New Canaan) ; Michigan 

 (East Lansing) ; New York (Bemus Point, Canajoharie, Chautauqua, 

 Gilbertsville, Ithaca, New Rochelle, and Syracuse) ; Ohio (Cleveland 

 and Puritas Springs in Cuyahoga Co.) ; Pennsylvania (Pittsburgh) ; 

 Quebec (Quebec); and Wisconsin (Madison). We have also studied 

 13d 1 , 189 from Europe (France, Belgium, and Germany). 



