REHN AND HEBARD 175 



2-2, one 2-3, two 3-4, three 4-4 and one 4-5. The one having 

 2-2 is depauperate in size. The dorsal al^dominal process is 

 similar in form in all of the males, while the distal margin of the 

 disto-dorsal segment varies from truncate to undulato-truncate. 

 The cerci show no noteworthy variation, while the subgenital plate 

 varies only in the shape of the distal margin, which is occasionally 

 angularly emarginate, and in the length of the styliform processes. 

 The females show no noteworthy variations. 



Synonymy. — This species was erroneously described by Scudder 

 as a Dichopetala, the correct generic assignment having been 

 given several years later by Morse. The brachypterous condition 

 of the type unquestionably influenced Scudder to refer the species 

 to Dichopetala, to which, however, it is in no way related. 



Remarks. — The association of the sexes in the present species, 

 as in carita, is indicated by both sexes sharing certain characters 

 which are more decided than in other species, the chief of these 

 being the broader head, the more inflated caudal femora and the 

 decidedly tri-strumose abdomen. 



Specimens Examined: 11; 8 cf, 3 9 . 



Between San Luis Obispo and San Simeon Bay, California, (Palmer), 

 1 d', [Scudder Collection]. 



Los Angeles County, California, (Coquillett), 4 d", [U.S.N.M.]. 



San Bernardino County, California, (Coquillett), 2 d, [U.S.N.M.J. 



Cahon Pass, California, July 18, 1897, (A. P. Morse), 1 9 • Type. [Scud- 

 der Collection] 



San Jacinto River, elevation 2500 feet, San JacintolNIountains, California, 

 July 25, (Fordyce Grinnell, Jr.), 1 d- Allolype, [A.N.S.P.]. 



Tighes, California, 1 9 , [Scudder Collection]. 



Crestline, Lincoln County, Nevada, elevation 6000 feet, September 4, 

 1909, (R. &H.), 19. 



Arethaea limifera new species (Figs. 48 and 58.) 



This species is an extreme development of the phylum to which 

 hrevicaiida belongs and from which form it differs most strikingly 

 in the stridulating field of the tegmina of the male (the only sex 

 known) being more specialized, the stridulating vein m.ore elongate 

 and excessively developed at the free margin into a peg-like process, 

 while the speculum is decidedly broader than long. As all the 

 material of the new form consists of two males dried after im- 

 mersion in alcohol, and consequently considerably shrivelled and 

 without any trace of the original color, only the most obvious dif- 



TRANS. AM. ENT. SOC, XL. 



