THE CANADIAN ENTOMOLOGIST. 235 



ir. O. Johannus, Needham. — N. Y. $ known. 



12 O. Carolus, Needham.— N. Y. S and ? known. 



13. O. anomalus, Harvey. — Maine, c^ known. 



STRAY NOTES ON SOME OF THE SPECIES. 



0. anomalus, Harvey (Ent. News, IX., 60. $. PI. V., fig. i.), is 

 like Herpetogomphus in the form of the terminal abdominal appendages 

 of the male. I have before me the hind wing of the type (which Pro- 

 fessor Harvey has kindly sent me), and the anal loop is of the typical 

 semicircular three-celled form of Ophiogomphus. 



O. Coiubrifius, Selys, is the most sharply marked species of the 

 genus. It is like the preceding in the generally darker coloration of the 

 body and in having the face transversely lineate with black, but it is 

 unlike all the others in extreme length of the inferior abdominal append- 

 age in the male, and in the straightness of the lobes of the vulvar lamina 

 in the female (PI. 5, figs. 7 and 34). 



O. /ohafinus,'Hd\\m., 2ind 0. Carolinus, Hag., are distinguished by 

 a second bifurcation of the inferior abdominal appendage in the male. 

 The figures of O. Johaiifius, drawn from the type, which was a somewhat 

 imperfect specimen and apparently not quite mature, may not fully 

 represent the species ; but the tips of the appendages and the genital 

 hamules were at least well developed (figs. 9, 18 and 27 of Plate 5). The 

 thicker parts of appendages are subject to some distortion in drying in 

 immature specimens. As to 0. Caroli?uis, Hag., the types are in the 

 Hagen collection at Cambridge, undescribed ; but a female nymph skin 

 from Bee Spring, Ky., Hagen has described and referred by supposition 

 to this species (Trans. Amer. Ent. Soc, XII., 258, 1885). This is 

 especially unfortunate, because the nymphs in this genus are well-nigh 

 undeterminable. If now the Kentucky nymphs should yield another 

 species of imago— a thing entirely possible — there would be synonymic 

 confusion of a rather unique sort. With small likelihood of settling the 

 question of the correctness of Hagen's supposition as to the nymph, it 

 would seem best to regard the name as rightfully belonging to the imagoes 

 from N. Carolina to which it was originally applied, and the types fixed 

 by the figures herewith presented (figs. 8, 17, 26 and 35 of Plate 5). 



O. Afainensis, Pack. (Proc. Ac. Nat. Sci., Phila., 1863, p. 255), and 

 O. Carolus, Ndhm. (Can. Ent., XXIX , 183, 1897), are very closely allied, 

 perhaps identical. If the males in the Hagen collection were the types 

 I should unhesitatingly pronounce 0. Carolus a synonym. But the 



