262 PHILIP p. CALVERT. 



One male, Phila., July 22, S. F. Aaron (A. E. S.)- One male, 

 on Delaware River opposite Eddystoue, Pa., July 28, 1886, P. P. 

 Calvert (C). 



United States east of the Rocky Mts., Cuba. 



35. Lieucorhinia Brittinger. 



Britt., Sitzb. Ak. Wiss. Wieu, 1850, iv, p. 333. Hagen, Trans. Am. Eat. Soc. 

 svii, p. 229, 1890. 



59. Leucorliiiiia intacta Hagen. 



Diplax i. Hagen, Syn. Neur. N. A., p. 179, 1861. L. i. Calvert, Trans. Am. Ent. 

 Soc. xvH, p. 39, pi. V, figs. 1, 7-9, 1890. Hagen, I. c. p. 235, pi. x, figs. 6, 8, 15, 16, 

 23, 1890. 



Blackish. Labrum white or yellow ; an orange or yellow dorsal spot on 2-7 

 (only on 7 in old individuals). Front wings with two very short basal streaks, 

 hind wings with a short, superior, basal streak and an inferior, triangular, basal 

 spot, blackish. 



% . Inf. app. bifid, its branches divergent, pointed. Anterior lamina each side 

 with an elevated black tubercle covered with small spines. 



9. Vulvar lamina forming two slender, separated lobes ; two small ventral palps 

 on the middle of 9. 



Abd. % 21-22, 9 20-22. H. w. % 23.5-25, 9 25-26.5. 



Two males, Phila., June 17; one male, Bristol, Pa., June 16, S. 

 F. Aaron (A. E. S.). One female (others seen), Ridley T\v])., Del. 

 Co., Pa., July 3, 1893, P. P. Calvert (C). 



Canada to Pennsylvania, west to South Dakota ; Nevada, Wash- 

 ington. 



36. I>iplax Charpentier. 



Charp., Lib. Eur. p. 12, 1840. Selys, Ann. Soc. Ent. Belg. xxxii, p. 134. 1888. 

 Sympetrum Newman, Ent. Mag. i, p. 511, 1833. Kirby, Trans. Zool. Sou. Lond. 

 xii, p. 276, 1889. 



A. No additional transverse carina on 4. 



a. % . Sup. app. with a, prominent, inferior, median tooth, on whose basal side 

 are 5-8 denticles. 9 • Vulvar lamina bifid. 



60. Diplax riibicuiidula Say (PI. II, fig. 5). 



Libellula r. Say, Jour. Ac. Phila. viii, p. 26, 1839. Diplax r. Hagen, Psyche v, 

 p. 385, 1890. 



Yellowish (teneral) to red; lateral margins of 3-10, especially near apices, 

 black. Legs black, femora paler inferiorly. Extreme base of wings yellowish. 



% . Genital hamule with a little more than the apical third bifid, internal (ante 

 rior) branch slightly longer, its apex more acute and slightly bent towards the 

 external branch ; external (posterior) branch twice as wide us theinternal. (i-enital 

 lobeprojectinguofarther ventrally than tbeexternalhamular branch, «o< widened 

 towards apex. 



