/8 ENTOMOLOGICAL NEWS. [Feb., '09 



America, 1875, adds Saskatchewan River to its range, but the 

 material for this record is not mentioned. 



Recently at Urbana, Illinois, through the kindness of Mr. 

 C. A. Hart, I examined the dragonflies in the Bolter collection, 

 now the property of the University of Illinois ; and we found 

 there five males and two females of a Somatochlora, all labelled 

 Duluth, Minn., which are decidedly interesting in this connec- 

 tion. The appendages of the male agree with those of Har- 

 vey's male of franklini, fig. I. pi. V., of my earlier paper, and 

 the individuals from the two localities are otherwise very simi- 

 lar. However, I believe they are distinct, and the differences 

 are pointed out in the following description : 



Somatochlora macrotona n. sp. 



Abdomen, including appendages, $ 41-42, 9 40-41 ; hind wing $ 27- 

 28, 9 26-27. 



In both franklini and macrotona the $ appendages suggest forcipata 

 and semicircularis, and in the two species, franklini and macrotona, are 

 indistinguishable so far as I can determine. As in franklini the basal 

 spot on the hind wings in the $ is small and extends no farther than 

 the anal loop, and may extend only slightly and indistinctly beyond the 

 anal triangle. In macrotona this spot is paler, but the specimens may 

 be faded by exposure to light. The only differences I am able to detect 

 betweeen the males of the two species are in the length of the abdomen 

 (41-42 in macrotona as compared with 36-37 in franklini}, and the 

 relative robustness of the head (7 wide in macrotona, 6.5 in franklini). 



The 9 shows the same great difference in length of abdomen when 

 compared with franklini (40-41 in macrotona, 33 in franklini}, and 

 leaves no doubt as to which species deSelys had before him. The head, 

 as in the $ , is wider than in franklini. . Moreover, the female appen- 

 dages of macrotona are 3 long, as compared with 2 in franklini.. In both 

 species the vulvar lamina is a dish-shaped ellipse, reaching the end 

 of the ninth abdominal segment. But on the second segment of the two 

 females of macrotona genital lobes fully half as large as those of the 

 male of the same species are developed. I know of no such develop- 

 ment in any other species of Somatochlora. At first glance I thought 

 the apical abdominal appendages of a female specimen had been attached 

 by some careless student to a male individual. It is altogether unlikely 

 that de Selys could have overlooked such a character in the two examina- 

 tions he made of the 9 type of franklini in the British Museum (the 

 specimen later incorporated in his own collection). The type $ and $ 

 of macrotona are in the Bolter Collection, University of Illinois, Ur- 

 bana. 



