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THE CANADIAN ENTOMOLOGIST 



feebly convex. Colour yellowish, darkened in the middle. Ap- 

 pendages about as long as vulvar lamina or as segs. 9 and 10 

 together. 



Measurements*. — (2 cT's, 10 9 's) — Length (without apps.) 

 cf 52.0-54.5, 9 47.5-56.5; thorax, d" 8-9, 9 7.5-8.5; abdomen 

 (without apps.), d' 38.0-39.5, 9 35.0-43.0; hind wing, d" 33.0- 

 34.0, 9 32.0-36.5 ; sup. apps. d 4 ; apps. 9 3.0-3.75; ptero- 

 stigma of hind wing (costal margin), cf 2.75-3.0, 9 2.8-3.5; 

 width of hind wing, cf 9.25-10.0, 9 9.0-10.3; width of head, d 

 7.6-8.0, 9 7.0-8.0. 



Holotype.—d Whitefish Pt., Chippewa Co., Mich., July 29, 

 1916 (A. F. Combs). Allotype. — 9, same data. Both in the 

 University of Michigan Museum, Ann Arbor, Mich. Paratopo- 

 types.—l cf 2 9 's Aug. 7, 1916; 6 9 's July 29, 1916; 1 9 Aug. 4, 

 1916, 1 9 without date. Total 2 cf 's 11 9 's. 



This species is a very close relative of S. forcipata. Its average 

 size is larger and the lateral thoracic spots differ in shape and 

 colour, otherwise the colour pattern approaches that of forcipata 

 closely. The superior appendages of the cf appear in profile 

 more like those of kennedyi than forcipata and, as in the former 

 the inferior appendage is only about half the length of the superiors. 

 The vulvar lamina is decidedly longer than in any other species. 



Somatochlora forcipata Scudder, 

 This slender, dark-coloured species is rather widely dis- 

 tributed but seems to be everywhere rare. It ranges from New- 

 *A1I measurements are in millimetres. 



