1922] NATURAL SCIENCES OF PHILADELPHIA 249 



subfamilies, on anything like the clean-cut lines recognized in the 

 past, is more and more realized. 



ALLOTERATURA new genus 



This genus is erected to include two Philippine species recently 

 described by Karny as members of the genus, Teraiura and three 

 new species here described. 



It is apparently closely related to Teraiura, differing strikingly 

 in the extremely short, conical last segment of the maxillary palpi. 87 



We cannot follow Redtenbacher and Karny in placing these 

 genera in the subfamily Conocephalinae as now understood. The 

 very close agreement in general structure with the genus Xiphidi- 

 opsis offers convincing proof that they should instead be referred 

 to the Listroscelinae. Though members of that subfamily, they 

 are aberrant in having the tibiae armed with shorter spines than 

 in any of the other genera there included. 



Genotype. — Alloteratura mindanao new species. 



Vertex shorter and narrower than first antennal joint, narrowly 

 triangular with bluntly rounded apex, the dorsal surface longi- 

 tudinally very weakly sulcate or subsulcate. Maxillary palpi 

 very elongate but with last joint very short, broader than long, 

 strongly conical. Pronotum much as in Xiphidiopsis, strongly 

 produced caudad with margin there convex, dorsal surface weakly 

 convex, lateral lobes with humeral sinus very weak to decided. 

 Lateral foramen of thorax largely concealed in males, visible from 

 latero-caudal point in females but never large and fully exposed as 

 in Xiphidiopsis. Tegmina and wings fully developed to moderately 

 reduced; stridulating field of male tegmina covered by production 

 caudad of pronotum. Prosternum unarmed. Male genitalia 

 showing very great specific differentiation, ultimate tergite produced 

 with caudal margin concave. High specialization often found in a 

 large plate above the subgenital plate and between the cerci, 

 which is developed from the ultimate tergite ventro-distad on each 

 side; thus the ultimate tergite forms a sort of yoke, a development 

 previously unknown to us. Female with genitalia much as in 

 Xiphidiopsis; cerci showing some swelling meso-distad; ovipositor 

 curving gently dorsad, with margins unarmed. Cephalic coxae 

 armed with a long spine. Femora unarmed, genicular lobes 

 rounded (except in sandakanae, in which species those of the caudal 

 femora are unispinose). Cephalic tibiae with apert auditory fora- 

 mina, the ventral margins armed with four internal and three or 

 four external, relatively short spines (the longest one and one-half 



87 These organs were not described or figured by Redtenbacher, but are shown 

 by Karny's figure to be of the normal elongate type in the genotype, T. monslrosa 

 Redtenbacher (Gen. Ins., Orth., Conocephalinae, Fasc. 135, pi. I, fig. 1, {1912).) 



