258 H. A. HAGEN. 



emerging from case while on a stone July 22, 1 874. The pinned imago 

 is a male not yet stretched out. After a careful comparison with the 

 only male in the collection of C. colubrinus it belongs very probably 

 to this species. If not, it is a new species. The skin is in good condi- 

 tion, 26 mm. long, and similar to the female skin just described. The 

 diflFerences are small, possibly sexual, and perhaps due to the bad condi- 

 tion of the female skin. The third joint of antennae is not so much 

 enlarged at tip, and the fourth joint is a short cone ; in the female these 

 parts are much compressed. The wing cases reach only half of segment 

 4. The dorsal hooks of the abdomen are equally well developed on seg- 

 ments 3 to 6. The middle appendage has before the apical third above 

 on each side a rounded blackish tubercle. After all I think the male 

 and the female belong to the same species. 



7. Ophiogoinphus caroliuiis (supposition). 

 Hagen, Oph. carolinus n. sp. 



One female nympha skin, from Bee Spring, Ky., May, 1874, by Mr, 

 F. G. Sanborn. Length 26 mm. 



Body stout, moderately hairy; head cordate, little notched behind, angles 

 rounded, globular; joint three of antennae less than thrice the length of the two 

 basals, flattened, bent upon tip, enlarged externally to about one-third of its 

 length; tip rounded; fourth joint rudimentary, short, conical; mask quadrangu- 

 lar, a little longer than broad, narrowed at base; middle third produced in a short 

 rounded lobe, with pavement teeth and a comb of flat scales ; palpus just meeting ; 

 a short, nearly straight lobe, narrowed to the rounded tip, faintly serrate inside; 

 movable hook sharp, slender, bent ; wing cases covering part of segment 4 ; ab- 

 domen stout, convex above, a little more than twice as long as broad; segments 

 8 to 10 tapering more suddenly; segments of equal length, 10th half as long as 

 9th; lateral spines short, sharp on 7 to 9 ; dorsal hooks of equal size on 2 to 9; 

 scars as usual; genitals marked; last segment tapering; appendages twice its 

 length, triangular, sharp; laterals a little shorter; legs slender, posteriors reach- 

 ing about segment 7 ; joint three of posterior tarsi longer than the two basals. 



This species is evidently an Ophiogomphus, but no species of this 

 genus was described from the Middle States. Among the described 

 nymphas it is nearest related to 0. colubrinus, but this species has the 

 third joint of antennae shorter, broader, and the dorsal hooks visibly less 

 developed. As now a pair of new species 0. carolinus Hag. from North 

 Carolina is discovered, the supposition that the larva may belong to this 

 species is probable. Of all other known species only 0. rupinsulentis 

 goes as far south as New York. Its larva is still unknown. 



