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1898.] NATURAL SCIENCES OF PHILADELPHIA. 15 



Nat. Hist. [6] xiii, p. 430, 1894), as on the front wings a dark-brown 

 streak occurs in the subraedian space from the cross-vein almost to 

 the distal end, and there is a small, separate brown spot in the same 

 space on the basal side of the same cross-vein ; in the subcostal space 

 of the same wings there are, between some of the antecubitals, small 

 pale brown spots in the midst of the yellow of the anterior margin. 

 This yellow extends to the pterostigma in all but two males. The 

 ventral abdominal spots of basilinea are not present. 



Recorded from Turkestan (Brauer), Persia and Yarkand (Selys). 



8. Orthetrum cancellation L. 



Five males, nine females, " below 5,000 f." 



Recorded from the eastern side of the Caspian and from Persia 

 (Selys). 



9. Orthetrum brunneum Fonsc. 



Five males, three females, " below 5000 f" ; two females " 5- 

 10,000 f." Not distinguishable from European specimens, with which 

 I have carefully compared them, and certainly different from gracile 

 (Albania) Selys and Ramburii Selys. One female has the discoidal 

 triangle of both hind wings crossed by one vein, but I can find noth- 

 ing to indicate that it is of a different species. 



Abdomen £27-28, 9 27-28. Hind wing £34-35, 9 34-35. 



Recorded from Turkestan (Brauer) and Persia (Selys). 



10. Orthetrum hyalinum Kirby (?) 



O. h. Kirby, Proc. Zool. Soc. Lond., 1886, p. 326, pi. xxxiii, figs. 5, 6. 



One female, " below 5,000 f," is probably this species, although it 

 is larger (total length 38 mm., abdomen 25, hind wing 29, alar 

 expanse 62), and the thorax is pale olive instead of reddish-brown, 

 which may not, however, indicate more than that this individual is 

 more immature. 



11. Orthetrum triangulare Selys. 



Libella t. Selys, Mittheil. zool. Mus. Dresden, iii, p. 314, 1878. 



Two males, " below 5,000 f." agree with the very brief diagnosis. 

 Their size is rather large; abdomen 31.5, hind wing 38 mm. 



12. Crocothemis erythrsea Brulle. 



Six males, five females "5-10,000 f." ; six males, five females 

 " below 5,000 f." Abdomen $ 21-23.5, 9 21-22 mm., hind wing $ 

 25-27.5, 9 25-29. In seven males and eight females, and on one side 



11 



