REHN AND HEBARD 171 



Allotype. — cf ; San Jacinto River, elevation 2500 feet, San 

 Jacinto Mountains, Riverside County, California. July 25. (For- 

 dyce Grinnell, Jr.) [Acad. Nat. Sci. Phila.] 



Description of Allotype. — The following characters are those of difference 

 from the description of the male of carita. Fastigium compressed, moder- 

 ately elevated, narrowing distad, the margins arcuate when seen from the 

 side, apex narrow, subtruncate and subdepressed, sulcate; facial fastigium 

 shorter and broader than in A. carita; eyes as in the female of the species; 

 antennae at least more than twice the length of the body. Pronotum some- 

 what less sellate than in ^1. carita, the dorsal line when seen from the side 

 straighter and less ascending cephalad and caudad, the dorsum consider- 

 ably constricted mesad; cephalic margin of disk emarginato-truncate, 

 caudal margin semicircular in outline. Tegmina very slightly shorter than 

 the caudal femora, rather narrow, the width at distal third one-ninth the 

 total length; marginal field shorter than in carita, nearly a fifth of the total 

 tegminal length; discoidal vein with four rami; stridulating field with its 

 greatest width (to apex of stridulating vein) very slightly less than the 

 length of the same field, free margin greatly produced at the apex of the 

 stridulating vein, distad of this near the base of the speculum rectangularly 

 emarginate and distinctly arcuato-emarginate at the apex of the same, the 

 speculum with its greatest (proximal) width slightly greater than its length, 

 stridulating vein slightly oblique, very faintly sigmoid, anal vein in the 

 field considerably arcuate. Portion of wings projecting distad of the teg- 

 mina three-fourths to five-sixths the length of the median femora. Ab- 

 domen with the segments as in carita, but the margins non-crenulate and the 

 projections of the same at the lateral pale bars more rounded; proximo- 

 dorsal segment with a decided erect trigonal process, which is clearly a 

 chitinous fold, excavate caudad and obliquely subtruncate cephalad; disto- 

 dorsal segment with the margin undulato-truncate; supra-anal plate as in 

 carita but the lateral margins and angles are more broadly rounded; cerci 

 more crassate than in carita, less distinctly tapering, the apex more dis- 

 tinctly incurved but not at all bent or even rotundato-angulatc ; subgenital 

 plate regularly and decidedly narrowing distad, the distal width not a third 

 the proximal width (a half in carita), distal margin deeply arcuato-emar- 

 ginate, lateral styliform processes brief. Limbs moderately short (for the 

 genus), the caudal femora proportionately more inflated; cephalic and me- 

 dian femora with bispinose, caudal femora with unispinose genicular 

 lobes. Median femora little more than half the tegminal length. Caudal 

 femora very slightly longer than the tegmina; caudal tibiae surpassing the 

 femora by about two-thirds the pronotal length. 



TRANS. AM. ENT. SOC, XT.. 



