1875.] 43 [Hagen. 



7. Herpetogomphus erotalinus, d", ?. 

 Erpetognmphus erotalinus Selys ! Monogr., 72, 18, pi. 4, f. 5 ; Syn., 

 21, 21; Addit., ii, 11, 21. — Hag. Syn.! 101, 6. 

 Erpetogomplius Menetriesi Selys ! Syn., 20, 20. 

 Hab. Mexico ; Brazil. 



Ophiogomphus. 



1. Ophiogomphus rupinsulensis, d", ?. 



Herpetogomphus rupinsulensis Walsh ! Proc. Acad. Philad., 1862, 

 388 ; Proc. Ent. Soc. Philad., i, 254. 



Erpetogomplius rupinsulensis Selys, Syn. Addit., n, 44, 21 octo. 



Ophiogomphus rupinsulensis Selys, Syn. Addit., Ill, 13, 21 octo. 

 (parti m ; only the male). — Hag., Hayden's Rep., 1873, 594. 



Hab. Rock Island, Illinois ; Upper Wisconsin ; Maine ; Ontario, 

 Canada. 



In the female the left spine behind the occiput was of different 

 form in four specimens. 



2. Ophiogomphus mainensis, d, ?. 



Ophiogomphus mainensis Walsh! Proc. Ent. Soc. Philad., I, 255 

 nota. — Selys, Syn. Addit., n, 45, 22 bis. 



Ophiogomphus rupinsulensis Selys! Syn. Addit., in, 13, 22 bis. 

 (partim ; only the female). 



Ophiogomphus mainensis Hag.! Hayden's Rep., 1873, 595. 



Hab. Maine. Only one male and the typical female are known, 

 both from the same locality and the same collector, Dr. A. S. Packard. 



3. Ophiogomphus Bison, d". 



Ophiogomphus Bison Selys, Syn. Addit., in; Append., 51, 22 ter. 

 Hab. California. Not known to me. 



4. Ophiogomphus colubrinus, d", ?. 



Ophiogomphus colubrinus Selys! Monogr., 76, 19, pi. 5, f. 1; Syn., 

 21, 22. — Hag. Syn! 101, 7. — Hayden's Rep., 1873, 592. 



Hab. Hudson's Bay Territory; Portneuf, near Quebec, Canada; 

 N. Hampshire. 



5. Ophiogomphus severus, d", ?. 

 Ophiogomphus severus Hag.! Hayden's Rep., 1873, 591. 



Hab. Colorado, foothills and plains, end of September; Fort 

 Garland, Col., June 27 ; South Montana and Yellowstone, N. Mexico. 



Given doubtfully in Hayden's Rep., 1872, 727, as 0. colubrinus 

 by me. 



