308 



PSYCHE. 



[February, 1902 



yellow. Abdomen, sti-ongly compressed, 

 slightly darker at the tip, the first and second 

 segments being vei'v slender. The claspers 

 of the male are rounded apically. 



Length about 23 mm. Wing spread from 

 30 to 35 mm. 



Habitat, Albany, N. Y. May 6, 1876 

 (W. M. Hill). Ithaca, N. Y., July 16, 

 1889 (J. M. Stedman). South Britain, 

 Conn. 1884 (G. F. Pierce). 



There are examples of this species 

 from Cambridge, Mass., in the collection 

 of the Museum of Comparative Zoology 

 and from Georgia and New Hampshire in 

 the collection of the Academy of Natural 

 Sciences of Philadelphia. Types will be 

 deposited in the New York State Mu- 

 seum and also at Cornell University. 



Of/iioii (Eniscopilus) a-ppendiculatum sp. 

 nov. — Light fulvo-ferruginous, larger opaque 

 spot of the cubito-discoidal cell with a small 

 extension on its posterior angle. The smaller 

 chitinous spot is nearly circular, light yellow 

 in color and slightly posterior to the center 

 of the glabrous area. 



This species differs in addition to the 

 above characteristics from the preceding 

 one in having the cubito-discoidal nerv- 

 ure slightly angled and not sinuate. It 

 is a smaller form, having a length of 18 

 mm. and a wing spread of about 27 mm. 

 This species is probably an inhabitant 

 of New Jersey, as it came into my 

 possession through the kindness of Dr. 

 J. B. Smith. The type is deposited in 

 the New York State Museum. 



ON THE UNITED STATES ORTHOPTERA WHICH HAVE BEEN 

 REFERRED TO THE GENUS TRIDACTYLUS. 



BY SAMUEL H. SCUDDER, CAMBRIDGE, MASS. 



An examination of nearly three hun- 

 dred specimens widely distributed over 

 the United States leads me to believe 

 that of the ten nominal species of Tri- 

 dactylus which have been accredited to 

 this country, only three names can be 

 retained : apicalis Say, tenninalis Uhl., 

 and minutus Scudd. To apicalis belong 

 I believe as synonyms tibialis Guer., 

 mixtus Hald., and probably illinoiensis 

 Thorn. ; to fer?ni?ialis, fissipes Sauss. and 

 incertus Sauss.; to w/;/«i'/^j',histrio Sauss., 

 and histrionicus Sauss. The discovery 

 by Mr. A. P. Morse of the variation in 



the fore tibiae of the male at once threw 

 doubt upon the validity of several nomi- 

 nal species and I can see no good reason 

 for retaining them. 



There is considerable difference, as 

 will be shown below, and as Saussure has 

 pointed out, between the smallest of our 

 species and the larger forms, and on 

 this account Saussure has applied the 

 name of Heteropus to this division, 

 which I am inclined to regard as of gen- 

 eric value. The name Heteropus, given 

 to an African species by Palisot de 

 Beauvois, cannot, however, be used here, 



