258 NEW NORTH AMERICAN DECTICINAE 



In addition to the type, we have before us three paratypic 

 males, bearing the same data, except that one was taken Sep- 

 tember 5, 1919. A small immature male is also at hand, taken 

 near the upper meadows on Whitney Pass Trail, at an elevation 

 of 10,700 feet, on September 6, 1919, by M. Hebard, near some 

 small shrubs growing on a narrow slope of decomposed granite, 

 at the foot of a twenty-seven hundred foot, south-facing precipice. 



The typical series was taken in the open on steep decomposed 

 granite sand slopes, overgrown with much sage and low thorny 

 bushes. From the above data the species is found to range from 

 the middle of the Western Yellow Pine (Pinus yonderosa jefj'reiji) 

 zone upward to near timber line in the zone of the Foxtail and 

 Lodgepole Pines {Piyius haljouriana and murrayana) . 



ACRODECTES29 new genus 



This genus has no known close affinities. The character of the 

 development leads us, however, to place it in linear arrangement 

 immediately after Idiostatus Pictet. From that genus it is separ- 

 ated by the form of the vertex, which shows a distal depression, 

 of the pronotum, which has a distinct transverse wrinkling and 

 is less produced and in the male sex is slightly raised caudad,^" 

 the more fully exposed tegmina in both sexes, which show a dif- 

 ferent type of reduction, in the strong medio-longitudinal carina 

 of the dorsal surface of the abdomen, the different general type 

 of male genitalic development, in the ovipositor being non-serrate 

 distad and the even greater reduction in the length of the distal 

 spurs of the caudal tibiae, particularly of the median pair. 



The genus is monotypic. Genotype. — Acrodectes philopogus 

 here described. 



Generic DescriqMon. — ^Size medium for the Decticinae, form 

 elongate but robust, surface shining. Head with vertex rather 

 broad, narrowing very weakly to the fastigio-facial suture, show- 

 ing a slight depression on its surface dorso-distad. Pronotum 

 short, with disk rounding evenly into the lateral lobes, except at 

 the distinct latero-caudal shoulders, the surface transversely 

 wrinkled, except in bri(>f caudal produced portion; lateral lobes 



2^ From czKpa = summit and or^KTYjg = a biter. 



■■*" In this feature some resemhiuncc to the type developed in Milrioptrm 

 HpfKKjiiornui (Walker) is shown. 



