42 EDWARD NORTON. 



The wings are not always equally obscure, but sometimes have ir- 

 regular clearer spots. 



Two specimens from Pennsylvania, (Coll. Am. Ent. Soe.) are 7- 

 spotted, having four on one side and three on the other side of abdo- 

 men. 



d.) 1. C. americana, var. decem-maculata. 



Cimbex decem-7naculata, d'Urban, Can. Zool., 18, 7085, 9 • 



Wings hyaline; abdomen 10-spotted, on second, third, fourth, fifth 

 and sixth segments. 



Spots approaching, not coalescing. Arctic Am. Youkon River. 

 (Smith. Ins.) 



Spots coalescing. Lake Superior, (Cambr. Mus.) Canada; Hud- 

 son's Bay Territory. 



d.) 2. C. americana, var. Dahlhomii. 



Ciinhex Dahlhomii, Guer. Icon. Reg. Anim. Ill, 393, 9 • 



Wings obscure violaceous. Abdomen 10-spotted ; second, third, 

 fourth, fifth and sixth segments. 



Spots not coalescing, those on second and sixth small. 



Spots coalescing, with or without the apical segment pale. 



New Jersey ; New York ; Pennsylvania. 



e). 1. C. americana, var. Alba, 9- 



Wings hyaline. Abdomen 12-spotted, on second, third, fourth, fifth, 

 sixth and seventh segments. 



Spots coalescing on the fourth, fifth, sixth and seventh segments, 

 the anal segment and apical half of venter, white. 



Big Island ; (It. Slave Lake, (Smiths. Ins.) Mr. Kennicott. 



The great similarity in kind of variation seems to prove that the 

 clear and dark winged specimens belong to the same species, subject 

 to as great changes as the G. imrUihiUs of Europe, which it greatly re- 

 sembles. The b.) 2, {La Fortci) has been bred from larvae which 

 produced also C. Ultni, a.) 2, S 9 , (Proc. Ent. Soc. Phil., I, 20L) 

 Dahlbom (Westwood Mod. Class. II, 98) states that the variations in 

 color of C. variabilis are produced by its diversity of food. This species 

 like that, is an exception to ordinary rules, for most Ilyuienoptei-a are 

 true to their types. 



The range of this insect is from the Atlantic to Russian America, 

 and but few of the clear-winged species are found south of the Great 

 lakes, while few of those with obscure wings are fi)und north of this. 



Klug described the male of C lucti/era as having spots on the ab- 

 domen, and in appearance like females. It would seem best to con- 



