1865.] 



47 



mandibles tipped with blackish ; antennae two-thirds the length of the 



body, fulvous, apical joints brown-black. Thorax: mesothorax indis- 

 tinctly punctured, the dorsal grooves broad and rather deep, with a 

 subobsolete elevated line down the middle of each groove; pleura 

 polished ; scutellum convex, deeply excavated in front, with the carina 

 on each side acutely developed; metathorax abruptly sloped behind, 

 with a broad shallow furrow posteriorly, becoming deeper towards the in- 

 sertion of the abdomen where the surface is longitudinally striated, re- 

 mainder of the surface indistinctly sculptured. Wings dark fuscous, 

 with a violaceous reflection, more obscure on the apical margins ; ner- 

 vures blackish. Legs, color of the body. Abdomen elongate, falcate, 

 apical segments compressed, but not very broad ; basal half of the 2nd 

 segment above, black ; anal processes broad, obliquely pointed at tips 

 which are acute. Length 12 lines; expanse of wings 17 lines. 



Collection. — Dr. J. G-undlach. One specimen. 



Closely allied to T. fuloescens, but is at once distinguished by the 

 dark violaceous wings, and the black apical joints of the antennae; the 

 face is not yellow, the mesothorax is more broadly furrowed, and the 

 abdomen is not so broad towards the apex. 



Thyreodon elegans. n. sp. 



Bright yellow; three broad stripes on mesothorax, sutures of thorax beneath, 

 posterior face of metathorax, femora, spot near tip of 1st abdominal segment, as 

 well as the basal half of the 2nd, black : abdomen margined with ferruginous 

 above and beneath ; wings yellow, apical margins fuliginous. 



Female. — Head yellow, shining, a spot behind the base of each an- 

 tenna, surroundings of the ocelli, tips of mandibles, a dot on middle of 

 the face just beneath the antennae, and most of the occiput, brown-black ; 

 antennae scarcely half the length of the body, stout, fulvous, the apical 

 joints black, the basal joiut beneath tinged with yellow. Thorax 

 shining, slightly pubescent, finely punctured ; mesothorax with three 

 broad, black, longitudinal stripes, the middle one extending from the 

 anterior margin almost to the scutellum, the lateral ones abbreviated in 

 front but reaching the posterior margin, dorsal lines obsolete, but the 

 middle is depressed in front and slightly carinated longitudinally, the 

 angles in front, on each side of the depression, are elevated into an ob- 

 tuse tubercle; pectus blackish, slightly reddish towards the collar which 

 has a yellow line extending down on each side; pleura polished, 

 yellow, with a broad, uneven, longitudinal line on each side bordering 

 on the posterior suture, a transverse line on each side below, and the 

 entire surface beneath between the four anterior coxae, black ; space 

 between the pleura and metathorax blackish, broadly yellow on each 



