NATURAL SCIENCES OP PHILADELPHIA. 77 



Color (siccus) pale yellow. A roseate stripe on the frontal tubercle : second 

 joint of the antennae orange yellow; a bright yellow curved line runs from 

 the upper canthus of each eye to the pronotum ; there they meet with broader 

 lines on the pronotum, which, converging posteriorly, fade near the middle 

 of the dorsum. Anterior portion of the pronotum dotted with red. Stridu- 

 lating organs very small, roseate. Elytra and wings pellucid. Abdomen 

 minutely clotted with reddish-brown. Tips of the cerci black. 



Dimensions. Length -75 in. ; to tip of the wings 1-25 in. ; wings pass the 

 elytra (about) -25 in. ; femur 1- in. ; tibia -95 in. 



Hab. Southern Colorado. Unique specimen. 



ORCHELIMUM, Serv. 



0. vulgare, Harr. 



The specimens I have marked as belonging to this species may prove to be 

 new, as they vary considerably from the type. 



0. gracile, Harr. 



Hab. Found in Colorado. 



UDEOPSYLLA, Scudd. 

 U. robusta, Hald. 



I have marked my specimens by guess, as I have no description of this 

 species at hand; but think from allusions to it in the descriptions of other 

 species, that my specimens belong there. Found in the parks. 



CENTHOPHILUS, Scudd. 



C. DIVERGENS, Scudd. 



My specimens vary in having the hind femora of the females spined, spines 

 very short. Yet I am inclined to believe they belong to this species. 



A CEWTjD.E. 



(Truxalicles.) 

 OPOMOLA, Serv. 



0. NEO-MEXICANA, nOV. Sp. 



Female. Long, slender, truxaloid. Head conical ; occiput convex, ascend- 

 ing to the somewhat elevated vertex ; vertex convex, ascending, sub-margined, 

 rotund, rather elongate before the eyes ; face very oblique ; frontal ridge dis- 

 tinct, sides parallel, slightly. sulcate ; lateral carina; distinct, obtuse, divergent, 

 reaching the lower corners of the face. Antennas strongly ensiform, trique- 

 trous, reaching to the tip of the pronotum ; situated in deep foveohe under 

 the front of the cone. Pronotum about as long as the head ; sides parallel ; 

 all its parts very regular ; tricarinate, carina? not elevated but distinct, all 

 about equal ; obtusely rounded anteriorly and posteriorly. Elytra a little 

 shorter than the abdomen ; wings a little shorter than the elytra. Posterior 

 femora reach the extremity of the abdomen ; very slender. Pro sternal point 

 short and obtuse, scarcely more than a pointed tubercle. 



Color (immediately after being taken out of alcohol, in which it had been 

 immersed for some months). Face yellow, dotted with red; lateral carina; 

 rosaceous ; on the top of the head a faint roseate stripe runs from the end of 

 the cone to the pronotum, bordered each side by a yellow stripe ; from the 

 lower part of each eye starts a bright red stripe which, running back across 

 the head, continues along the upper portion of the side of the pronotum to 

 its extremity and is lost on the elytra. Median carina of the pronotum red, 

 the dorsal spaces yellow; lower portions of the sides yellow. Ely tr a semi- 

 transparent ; base and stripe along the dorsal margin roseate. Wings trans- 



1870.J 



