1865.] 49 



black ; antennae dusky, two basal joints yellow. Thorax honey-yellow, 

 the mesothorax, pectus, tegulae and scutellum stained with yellow ; 

 metathorax with the elevated lines well defined, the central area rather 

 large and pentangular, black, the area behind it finely rugose. Wings 

 hyaline, iridescent; nervures and stigma pale testaceous. Legs yellow- 

 ish, tinged with honey-yellow, the coxae and trochanters yellow, the 

 posterior tibiae and tarsi somewhat dusky. Abdomen elongate, very 

 slender at base, gradually broader and much compressed towards the 

 tip ; base of the 2nd and 3rd segments above, and the two apical seg- 

 ments entirely, fuscous. Length 3 lines; expanse of wings 4 lines. 

 Collection. — Dr. J. Gundlach. One specimen. 



May possibly be the male of P. fulvescens, from which it differs in 

 the sculpture of the metathorax, and in the somewhat different color- 

 ation. 



Genus TRACHYNOTUS. Grav. 



Trachynotus cincticornis, n. sp. 



Honey-yellow 9 • rufo-fermginous % : antennse longer than the body, with a 

 broad yellowish annulus near the tip ; posterior tarsi with 2nd and 3rd joints 

 whitish; four anterior legs, and apical half of abdomen in % , honey-yellow; 

 wings hyaline. 



Female. — Honey-yellow, slightly pubescent ; face sparsely but deeply 

 punctured; antennae slender, rather longer than the body, apical two- 

 thirds blackish, with a broad yellowish annulus near the tip, basal 

 third rufous. Thorax shining beneath ; mesothorax roughly and con- 

 fluently punctured, somewhat rugose ; most of pectus and a depression 

 on the pleura beneath the wings smooth and polished, rest of pleura 

 sparsely and deeply punctured ; scutellum rugose, the excavation in 

 front transversely striated, the spaces on each side deeply excavated, 

 the posterior one striated ; metathorax rugose, smoother and shining at 

 base, on each side of which, above, there is a semicircular carina enclos- 

 ing a small space which is smooth and polished and from which there 

 are several carinae radiating posteriorly, but soon become lost in the 

 rugosity, the smooth space at base, between the two semicircular spaces, 

 is somewhat depressed, sides of the metathorax clothed with a fine 

 whitish pubescence. Wings obscure hyaline, faintly iridescent; ner- 

 vures and stigma brown. Legs honey-yellow, the two anterior pairs 

 pale, the apex of the posterior tibiae and their tarsi, dusky, the 2nd 

 and 3rd joints of the latter whitish. Abdomen : the two basal seg- 

 ments long and slender, cylindrical, polished, rufo-ferruginous, apical 

 segments compressed and pale honey-yellow; ovipositor exserted about 



