242 PHILIP p. CALVEKT. 



Maine, Massachusetts, New York, Ontario, Wisconsin, Kansas, 

 Texas, Fla., Kentucky, Maryland (Miss Wadsworth, Mrs. Slosson). 



13. Ophiogoiiipliiis Selys. 



Selys, Bull. Ac. Brux. xxi, pt. 2, p. 39, 1854. C. R. Soc. Eut. Belg. xsii, p. Ixiv, 

 1879. 

 Ophiogoiiipliiis riipiiisuleiisis Walsh. 



Herpetogomphus r. Walsh, Proc. Ac. Phila, 1862, p. 388. 0. r. Selys, Bull. Ac. 

 Belf;-. (2) xlvi, p. 434, 1878. 



Greenish yellow. Thorax with a humeral stripe, frequently an antehumeral 

 stripe, aud a Hue ou secoud lateral suture, hrown. Abdomen browu, au elon- 

 gated dorsal yellow spot, pointed posteriorly, on 1-8 or 10. 



% . Sup. app. a little longer than 10, robust, apex obtuse, apical half denticu- 

 lated below. Inf. app. not as tnide as divergence of sup. app., its branches trun- 

 cated to form the acuter angle at inner side, space between branches half as wide 

 as either branch. 



9 . Occiput with a short yellow spine each side. Vulvar lamina almost as long 

 as 9, triangulai", bifid in more than its apical half, the branches contiguous, but 

 their extreme tips divergent. 



Abd. I 35-38, f 35-38. H. w. % 28-33.5, 9 32. 



Quebec, Maine, New York, New Jersey, Pennsylvania, Ontario, 

 Illinois, Wisconsin (Provancher, C. W. Johnson, A. E. S.}. 



14. Gomphiis Leach. 



Leach, Edinb. Eucyc. ix, p. 137, 1815; Amer. ed. (Phila.) viii, pt. ii, p. 726, 

 lyl6. Selys, Mou. Gomph. p. 115, 1858. 



A. Abdominal segments 7-9 not greatly dilated {i. e. not 3-4 times as wide as 4;. 

 ((. Dorsum of 10 mostly black. Occiput not denticulated behind. 

 Ciioiuplius uteviusi Hagen. 



G. n. Hagen, Bull. Ac. Belg. (2) xlvi. p. 462, 1878. 



9 . Greenish yellow. The following black : suture between frous and uasus, 

 base of labrum, frons above at base, vertex, occiput. No spines on vertex. Hind 

 margin of occiput slightly concave. Blackish brown predominating on thoracic 

 dorsum so as to leave a transverse anterior, an isolated autehumeial aud a hu- 

 meral stripe, yellowish ; sides greenish with three brown stripes. Abdomen 

 black; 3-9 with a transverse basal ring, sometimes medially interrupted, 2, 3 

 and 8 with a mid-dorsal spot— yellow. App. white or yellow. Vulvar lamina 

 one-fifth as long as 9, apical half bilobed, tips rounded. 



% . Unknown. 



9. Abd. 25, h. w. 21. 



Maine (Harvey), York and Berks Cos., Pa. (Hagen L c.) 



(irouiplius parvulus Selys. 



G. p. Selys, Bull. Ac. Brux. xxi, pt. 2, p. 56, 1854; (2) xlvi, p. 459, 1878; Mon. 

 Gomph. p. 157, 1858. 



Black predominating, the following yellow : a transverse stripe on frons above, 

 ou nasus and ou labrum ; on thorax a transverse, medially-interrupted anterior, 



