210 PROCEEDINGS OF THE ACADEMY OF [May, 



large, external foramen and a small internal one of variable exact 

 size and indication. Caudal tibiae with each dorsal margin armed 

 with four to five spines; distal spurs of caudal tibiae three in number 

 on each side, the median the longest in each group, ventral spur 

 on each side short, the two subequal in length: caudal metatarsus 

 elongate, over twice as long as the remaining tarsal joints, dorsal 

 surface armed the whole length of the external margin and distad 

 on the internal margin, internal apical metatarsal spur over one- 

 half as long as third tarsal joint. Ovipositor shorter than caudal 

 femora, straight, apex acuminate, dorsal valves surpassing ventral 

 ones. 



Aphemogryllus gracilis n. sp. (PI. II, figs. 48-.j3.) 



Type: cf; Igarape-assii, State of Para, Brazil. February 6, 1912. 

 (H. *S. Parish.) [Acad. Nat. Sci. Phila., Tvpe no. 5327.] 



Size small : form much like species of Nemohius: surface moderately 

 polished. Head distinctly broader than the pronotum, moderately 

 inflated: occiput strongly and regularly declivent from its caudal 

 section to the interantennal protuberance; latter region but slightly 

 wider than a single antennal scrobe, well rounded when seen from 

 the side, its lateral margins faintly converging ventrad: ocelli disposed 

 in a broad, depressed triangle, relatively large: palpi relatively short, 

 robust, compressed; forth joint of same subequal to the third, slightly 

 expanding; fifth joint distinctly compressed mesad, gradually expand- 

 ing distad, the apical margin strongly oblique truncate: antennae 

 at least as long as the body. Pronotum strangulate when compared 

 with the head, the greatest width about one and one-half times the 

 greatest length: cephalic margin truncate, caudal margin feebly 

 bisinuate, both margin strongly hirsute, the surface of the pronotum 

 with many short, adpressed hairs; a fine medio-longitudinal sulcus 

 present, which becomes weaker caudad: lateral lobes subquadrate, 

 the ventral margin moderately arcuate ascendent caudad, the 

 ventro-cephalic angle broadly rounded, the ventro-caudal obtuse. 

 Tegmina well developed but falling slightly short of the apex of the 

 body; apex well rounded: lateral field relatively broad; mediastine 

 vein simple, preceded by two free veins, these diverging from an 

 identical point near the base of the tegmen, the space between the 

 vein itself and the first free vein quite wide; humeral and discoidal 

 veins close to one another and at several points coalescing; stridulat- 

 ing field relatively simple, no speculum present and normal Gryllid 

 venation quite recognizable; median vein straight, simple; ulnar 



