508 PROCEEDTNQS OF THE NATIONAL MUSEUM. vol.52. 



wing and the female pryeri in the same collection has six in the left 

 and seven in the right hind wing.) Anal vein of liind wings with 

 four to six branches. (See figs. 126-129.) 



Tyi^e of the genus. — Tachopteryx Jiageni Selys. This genus con- 

 tains also Tachopteryx pryeri Selys of Japan. 



The name proposed is from the Greek: Tdj'i;7rT€pi;^ = swift- winged. 



The erection of this genus leaves in Tachopteryx Selys only the 

 species thoreyi, which occurs in the Appalachian Mountains of the 

 eastern United States. The genus Tachopteryx may then be described 

 in its restricted sense as follows : 



TACHOPTERYX Selys, restricted. 



Of the Petalurinae. Eyes widely separated. Labium with median 

 lobe cleft. Whip of antenna jointed. The internal triangle of the 

 front wings three celled, its sides subequal. Superior appendages 

 of the male only moderately dilated. No large tubercle on ventral 

 side of metathorax. Color largely yellowish olive. 



Wings with a richer venation than in Tanypteryx. The sixth or 

 seventh antenodal developed as a brace vein. The anal loop with five 

 to seven cells. The anal vein of hind wings with six to eight branches. 

 (See figs. 130-132.) 



Tyj^e of the genus. — Tachopteryx thoreyi Selys. 



TANYPTERYX HAGENI (Selys). 



Tanypteryx hageni has not been recorded since the original specimen 

 was described by Selys. The two specimens in the California Academy 

 of Science collection were taken by Prof. E. C. Van Dyke, at Monroe, 

 Washington, in July, 1915. The eastern Tachopteryx thoreyi inhabits 

 mountain swamps and bogs. As Monroe, Washington, is on the 

 west side of the Cascades where there is a very long rainy season, 

 probably Tanypteryx inhabits similar situations there, and with a 

 step further one can infer that the type-specimen collected in 

 "Nevada" came from some high mountain swamp. 



A teneral female of Tanypteryx hageni is preserved in the Phila- 

 delphia Academy of Science. This was collected in California, proba- 

 bly by Behrens, in Shasta County. One other specimen is in the 

 Museum of Comparative Zoology. This is from Reno, Nevada, col- 

 lected by Morrison in 1878. 



The following is a description of the two specimens in the Museum 

 of the California Academy of Science: 



Color of male. — Face dark brown except a yeUow spot at base of 

 each mandible (the "dark brown" of this species approaches black, 

 only a close examination showing that it is not true black). Frons 

 yellow, excepting a small brown area on each side below and a nar- 

 row brown band across its posterior edge. Vertex dark brown. 



