JAMES A. G. REHN 365 



GRYLLIDAE 



Undecous lizeri new species (PI. XIX, figs. 14, 15, 16 and 17.) 



Wq have referred this species to the present genus with some 

 hesitation, as it shows certain features not fully in accord with 

 the generic description, as the biseriately serrulate dorsal surface 

 of the caudal metatarsi and the presence of four distal spurs on 

 the median tibiae, but until we know more about E. arachnopis, 

 the genotype, it seems most advisal)le to place the new species 

 here. From arachnopis the present species differs, in addition 

 to the above features, in the larger size, more elongate male 

 tegmina, the speculum of the same with l)ut a single cross- vein, 

 and other details of the venation. The female is apterous. 



Type. — cJ^ ; Boundary between Cordoba and San Luis Provinces, 

 Argentina. (C. Lizer.) [Academy of Natural Sciences of 

 Philadelphia, Type no. 5328.] 



Size medium: form subfusiforni, more attenuate caudad: surface of bod}' 

 largely covered with a generally adpressed coat of short hairs. 



Head with greatest width across genae contained one and two-fifths times in 

 the greatest depth of head, seen from dorsum or front the genae are distinctly 

 though not strongly bullate; occiput seen from side narrowly arcuate caudad, 

 thence strongly and obliquely dcclivent to the interantennal region; interan- 

 tennal area moderately produced, roundly obtu.se-angulate, when seen from the 

 front with its greatest width distinctly greater than that of proximal antennal 

 joint, narrowing slightly ventrad to the small median ocellus, thence ventrad 

 slightly widening, less distinctly haired ventrad than dorsad; face transverse, 

 with the infra-ocular sections appreciably concave: palpi very elongate, slender; 

 third palpal joint straight, uniform in width, subequal to the fourth joint in 

 length; fourth joint somewhat narrowed proximad; fifth joint about one and 

 one-half times as long as the fourth joint, slender in proximal half, enlarging 

 distad, with the distal extremity obliquely arcuato-truncate, the whole joint 

 weakly arcuate when seen from the side: eyes relatively small, moderately 

 prominent, basal outline acute subovate, the. point ventrad, the dorsal section 

 of outline rectangulate, the depth subequal to that of the infra-ocular portion 

 of the genae: antennae incomplete, {)roximal joint large, apprecial)ly depressed, 

 l)articularly proximad, second and remaining joints small. 



Pronotum transverse, the greatest length contained one and two-thirds times 

 in the greatest width of the entire pronotum, the dorsum straight in longi- 

 tudinal section and arcuate transversely, regularly rounding into the lateral 

 lobes, which latter are subvertical dorsad and strongly flaring laterad ventro- 

 laterad: cephalic margin of disk truncate, caudal margin sul)sinuato-truncate, 

 lioth margins stronglj' cingulate; surface of disk mesad with a small transverse 

 depression inunediately caudad of the margin, thence caudad for t luce-lift lis 



TRANS. AM. ENT. SOC, XLIV. 



