1909.] 



NATURAL SCIENCES OF PHILADELPHIA. 



417 



placed in a triangle, two dorsad, one ventrad, the dorsal ones well 

 separated, those of the female quite small compared with the large 

 jewel-like ocelli of the male; eyes large, 

 quite prominent, very broad elliptical 

 in shape when seen from the side, not 

 elevated dorsad of the occipital line; 

 antennae setaceous in both sexes, slend- 

 erer and shorter in the female than in 

 the male. Pronotum slightly longer 

 than twice the width of the head, the 

 supra-coxal width contained four (cT) 

 or three and a half ( 9 ) times in the 

 length of the pronotum; shaft consid- 

 erably compressed mesad, the whole 

 shaft carinate, the expansion and collar 

 pyriform, broadly ( 9 ) or narrowly (c?) 

 so, margins of the male unarmed, rather 

 strongly denticulate cephalad in the 

 female, the teeth becoming weaker 

 caudad until absent from the caudal 

 portion. Tegmina of the male very 

 slightly exceeding the apex of the abdo- 

 men, hyaline with the rather narrow 

 costal field opaque and sub-coriaceous; 

 tegmina of the female about equal to 

 the pronotum in length and reaching 

 about to the middle of the abdomen ; 

 costal margin considerably arcuate prox- 

 imad; the costal field slightly more 

 than a fourth the width of the whole 

 tegmen ; apex rounded ; stigma distinct, 

 longitudinal. Wings hardly exceeding 

 the tips of the tegmina. Supra-anal 

 plate of the male transverse, the apical 

 margin regularly but not very greatly 

 arcuate; subgenital plate of the male 

 moderately produced, the apical margin very narrowly and angularly 

 emarginate; cerci slightly exceeding the apex of the subgenital plate, 

 tapering, the joints elongate sub-moniliform ; supra-anal plate of 

 the female strongly transverse, the margin rotundato-angulate ; sub- 

 genital plate compressed, rostrate caudad; cerci about three-fourths 



Fig. 1.- 

 n.sp. 

 type. 



Stagmom antis ca lifornica 

 Dorsal view of female 

 (X 2*.) 



