1865.] 273 



each side, the basal margin prominent, the apical margin subtruncate 

 and brownish ; antennae more than half the length of the body, entirely 

 black. Thorax shining, closely and finely punctured ; mesothorax with 

 a broad, white hooked line on each side ; tegulas, a spot before and a 

 line beneath the anterior wing, a large quadrate spot on the scutellum 

 covering nearly its entire surface, and a transverse line on the post- 

 scutellum, white ; metathorax finely and densely rugose, without ele- 

 vated lines. Wings ample, hyaline, beautifully iridescent; nervules 

 pale fuscous, whitish at base, as well as the costa and a spot at the base 

 of the stigma. Legs pale rufous; anterior coxae and trochanters yel- 

 lowish-white ; tips of the posterior tibiae and their tarsi entirely, duskv. 

 Abdomen shining black, very closely and minutely punctured and sub- 

 depressed at base, apex subcompressed; on each lateral apical corner 

 of the second and following segments, a rather large whitish spot. 

 Length 3 lines ; expanse of wings G lines. 

 One specimen. 



Genus BANCHUS, Fabr. 

 1. Banchus superbus. n. sp. 



Black ; face, orbits, antennae beneath, hooked mark on each side of mesotho- 

 rax in front, a transverse line on its disk, a large elongate mark on the pleura, 

 scutellum, apex and spot on each side of metathorax, most of legs, and broad 

 apical margins of abdominal segments, bright yellow ; wings yellowish-hya- 

 line. 



Male. — Black, shining; face — except a central longitudinal black 

 line, dilated at base of clypcus with a black dot on each side of it. — 

 the clypeus, frontal orbits — confluent with a line that passes in front of 

 the ocelli and enclosing a large black spot behind the insertion of each 

 antenna, — broad outer orbits, and the mandibles except extreme tips, 

 all bright yellow ; palpi pale, varied with fuscous; clypeus with a deeply 

 impressed line down its middle; antennae as long as the body, slender, 

 curled at tips, black above, yellowish beneath, except at extreme apex, 

 basal joint bright yellow beneath. Thorax closely punctured ; a large 

 hooked mark on each side of mesothorax anteriorly, a small transverse 

 line on its disk, emarginate behind, tegulae, a transverse line beneath, 

 a large elongate mark on each side of the pleura anteriorly, a sinuate 

 line on the upper margin of the prothorax, a spot on each side of the 

 collar, and a spot in front of each anterior coxa, emarginate before, all 

 bright yellow ; scutellum prominent convex, polished, bright yellow, 

 with a very small, acute, dusky tubercle on its disk ; postscutellum also 

 bright yellow ; the carinae on each side of the mesothorax behind, and 

 on each side of both scutellums, yellowish ; metathorax very closely 

 and finely punctured, its posterior face excavated, abrupt and bright 



