76 PROCEEDINGS OF THE ACADEMY OF 



especially the older or more mature ones. This may be important in fixing 

 the position of the genus, which is evidently one of transition. 



THAMNOTRIZON, Fischer. 



T. purpurascens, Uhler. 



Found in the parks of the Rocky Mountains and on the more elevated 

 plains of Colorado and New Mexico. I have removed this from Anabrus, the 

 prosternum not being spined. 



T. TRILIXEATCS, nOV. Sp. 



Female. Small, somewhat like. A. rninutus, Thos , but presenting some 

 marked differences. Head moderate size, immersed in the pronotum nearly 

 to the eyes ; occiput very short, convex ; vertex rounded between the antennae, 

 slightly advanced in front, this advanced portion triangular and deflexed ; 

 face short, broad, smooth, somewhat convex ; labrura large, round. Palpi 

 rather longer than usual, slender, cylindrical ; terminal joint of the. maxillary 

 palpi the longest. Pronotum small, rounded, not carinated ; advanced in 

 front over the back of the head, margin round, or sub-truncate ; posterior 

 extremity extended over the base of the abdomen, round ; sides narrowed 

 below, reach only about the lower border of the eyes; posterior margin of the 

 sides sloped quite obliquely, slightly sinuate. Antennae reach the tip of the 

 ovipositor. Ovipositor about the length of the body, slightly bent; cerci 

 short, stout, covered with minute depressed hairs : the plate between them 

 triangular. Prosternum not spined. Anterior tibia? with two spines in front; 

 medial with two rows on the outside 4 (counting the one at the base) and 2. 

 (Posterior legs wanting in the only specimen obtained.) 



Color. (Siccus) testaceous green striped and varied with pale yellow. 

 Face testaceous, palest below, with a brown spot at each lower corner. Three 

 pale, tolerably broad, yellow stripes reach from the head to the end of the 

 abdomen ; one along the back and one along each side. Two oblique black 

 marks on the back of the pronotum about the middle ; lower margins of the 

 sides yellow; beneath pale. Ovipositor fuscus. Antenna? fuscus. Legs 

 purplish, tarsi piceous. 



Dimensions. Length -75 in.; to the end of the pronotum "34 in. ; ovipositor 

 73 inch. 



Ilab. S. E. Colorado. 



EPHIPPITYTHA, Serv. 



This is given by Serville only as a subgenus of Phaneroptera, but the char- 

 acters which distinguish it from the rest of the Phaneropteres certainly justify 

 me in raising it to a genus. Prothorax selliform, more or less scooped trans- 

 versely, elevated posteriorly. Front tuberculate. 



E. GRACILIPES, IIOV. Sp. 



Male. Small, slender, legs very long and delicate. Occiput short, convex, 

 terminating in a triangular tubercle at the vertex, not raised above the first 

 joint of the antenna;, nor passing between them ; face vertical, straight, flat, 

 terminating upward just above the central ocellus in a sharp angle; ocellus 

 situated exactly between the lower borders of the folds around the base of 

 the antennae. Pronotum selliform, sub-cylindrical in front, widened and 

 elevated posteriorly ; a slight transverse indenture each side a little behind 

 the middle; not carinated, surface smooth, with a very soft velvety appear- 

 ance. Elytra very narrow and straight, passing the abdomen one.-third their 

 length ; wings narrow, longer than the elytra. Abdomen sub-cylindrical : 

 sub-anal plate notched and bi-spinose ; cerci stout, hairy, curved and mu- 

 cronate; upper plate semicircular. Prosternum not spined ; meso- and meta- 

 sternum have the posterior angles obliquelv raised, obtuse. 



[July, 



