1920.] 



NATURAL SCIENCES OF PHILADELPHIA. 



289 



caudal femora being without distinct black markings and the teg- 

 mina with the veins unlined with piceous, and in the smaller size. 

 Some affinity is shown to Parametrypa and some similarity to Cylin- 

 drogryllus and Tapinopiis is noted, but from the former the new 

 species differs chiefly in the femoral spination, as well 

 as the elongate and fully developed tegmina, while 

 the shorter pronotum, elongate tegmina, tibial and 

 metatarsal spination, and the abbreviate distal caudal 

 tibial spurs are the more readily perceived features of 

 difference from Cylmdrogryllus. From Tapvnopiis the 

 new form differs in the shorter head, shorter and 

 simpler pronotum, the imperforate cephalic tibiae, the 

 short cephalic tarsi and the slender ovipositor, which 

 has the distal valves short and slender. 



Type. — 9 ; Bonito, State of Pernambuco, Brazil. 

 January 17, 1883. (A. Koebele.) [United States Na- 

 tional Museum.] 



Size medium: form quite elongate, slender, sub- 

 equal in width: surface of body and limbs with ad- 

 pressed pile, on the tegmina a similar, but more de- 

 cidedly microscopical, pile covering is present. Head 

 with, its caudal width slightly greater than the ceph- 

 alic width of the pronotum, depressed, dorsal sur- 

 face deplanate, greatest width across eyes but faintly 

 vectis new spe- less than the greatest length of the head, the great- 

 outline ofle- ^^^ depth of the head distinctly less than the greatest 

 male (type), width: occiput gently rounded, the interocular portion 

 KX 6/2). q£ ^j-^p dorsum plane, almost imperceptibly excavate; 



ocelli placed in a strongly arcuate line, small, the median one slightly 

 smaller than the lateral ones, the median ocellus fossetted cephalad, 

 all the ocelli well separated from each other and also from the 

 eyes: interantennal rostrum with the width subequal to that of the 

 proximal antennal joint, the lateral outline of the rostrum arcuate 

 obtuse-angulate when seen from the side: palpi moderately elongate; 

 fourth joint slightly shorter than the third joint; fifth joint elongate 

 securiform, its flexor length slightly greater than that of the obhque 

 subtruncate distal margin : eyes hardly prominent, elhptical in basal 

 outline, shghtly declivent cephalad in their general trend from the 

 horizontal: antennae broken. 



Pronotum with the greatest dorsal width about a fourth greater 

 than the median length, the disk weakly transverse, the lateral bor- 



Fig. 3. — Nessa 



