472 [June 



apical, yellow band, that on the first segment deeply, broadly and ob- 

 tusely emarginated on the middle anteriorly, those on the remaining 

 segments with a very broad, square, emargination anteriorly, sometimes 

 broken into two emarginations, one on each side of the middle ; apical 

 segment mostly yellow ; venter yellow, with the basal margins black. 

 Length 62 lines; expanse of wings 10 lines. 



Male. — Resembles the female, but the markings are less developed ; 

 the orbits are not so broad j the prothorax is black, except its lateral 

 and posterior margins ; the mesothorax is entirely black, except a short 

 line over the tegular; most of the pleura and metathorax is also black, 

 and the yellow bands on the abdomen are narrower and less developed ; 

 the black basal margins of the ventral segments are broader. 



Two 9, one % , specimens. Closely allied to M. pictifrons Smith, 

 but is smaller, the wings much larger and the markings of the head 

 and abdomen are different. 



5. Monedula ventralis, Say. 

 Moncdula ventralis, Say, Long's Second Expedition, ii, p. 337. 

 One % specimen. 



Fam. NYSSONID.E. 



Genus LARRA, Fabr. 

 Larra unicincta. Say. 



Stizus unicinctus, Say, West. Quar. Rep. ii, p. 77 ; American Entomology, pi. 2. 



Five specimens. 



Genus GORYTES, Latr. 

 1. Gorytes venustus. n. sp. 



Black, sericeous ; clypeus, line on collar, tubercles, scutellum, two large spots 

 on metathorax and broad bands on abdomen, yellow ; antennae except tip, 

 most of legs, and part of first and second segments of abdomen, fulvous; wings 

 yellowish-fuscous, a dark fuscous cloud about the marginal cell; stigma yellow. 



Female. — Black, shining, covered with a very fine, dense golden* 

 sericeous pile, more obvious in certain lights; clypeus, labrum, a dot 

 between the antenna;, and frontal orbits abbreviated above and dilated 

 beneath, yellow; mandibles black, piceous at tips; palpi yellowish ; 

 antenna; fulvous, the four or five apical joints black, the scape yellow- 

 ish beneath. Thorax : a line on the collar, tubercles, a spot beneath 

 the anterior wing, the scutellum, except the basal margin, and two lon- 

 gitudinal ovate spots on the metathorax, yellow; the tegular and a line 

 over them, fulvous ; enclosed space of metathorax with a central well- 

 impressed longitudinal line. Wings yellowish-fuscous, with a golden 

 or slight purplish gloss; a dark fuscous cloud covering the marginal 

 and part of the second and third submarginal cells; stigma pale yellow ; 



