156 IMMriLID^E, 



a few black markings ; wings I'usco-hyalino, with a bright violet 

 iridi'scenco, tho norvurcs black. The oycs and bovou or eight of 

 the apical joints of the antenna) black ; the anterior margin of tho 

 clypeus .slightly em.irginate. Tho hinder margin of the pro- 

 thorax rounded ; the metathorax short, concavo-truncatc, tho 

 lateral angles of the truncation produced, subtubcrculatc ; the 

 middle of the melathorax black ; the .sutures at the sides narrowly 

 black. The apical margins of tho two basal segments of the ab- 

 domen black. 



Hub. Costa llica, Irazu, GOOO-7000 feet. 



51. Pompilus flavopictus. 



Female. Leugth 6 lines. — Variegated with black and yellow ; the 

 wings fulvo-hyaline, the nervures ferruginous. Tho black mark- 

 ings on the head are a narrow transverse lino at the base of the 

 clypcus, a broader one from each antenna passing upwards and 

 uniting with a transverse line between the eyes, and the back part of 

 the head, leaving a broad yellow stripe behind the eyes ; the tips 

 of the mandibles are black, and also the scape above and the base 

 of the anteunjiD, beyond which the flagellum is fulvous, with four or 

 five of the apical joints slightly fuscous. The mesothorax with 

 three broad black longitudinal stripes ; the scutellum in the middle, 

 a longitudinal line in the middle of the metathorax, and also an 

 interrupted line at the sides black ; the sutures at the sides, and a 

 line on the coxae and femora above, black. The anneal margins of 

 the first and second segments of the abdomen black ; the following 

 segments are obscure, the third being palest at its basal and apical 

 margins, the basal having a changeable white pile. 



Male. Ecsembles the female, but is smaller (3| lines), and has the 

 abdomen bright yellow, with broad black fasciae on the apical mar- 

 gins of the three basal segments ; on the two following the bands 

 are fuscous and narrow; on the apical segments the fascia) arc 

 obsolete. 



Having only seen a single specimen of the female, it is impossible 

 to determine whether the yellow colouring of the abdomen is ever 

 bright on the apical segments, but it most probably is so. 



llah. Costa Eica, Cache. 



PEPSIS, Fabr. 



1. Pepsis solitarius. 



Male. Length 8| lines. — Dark green, the abdomen brightest ; legs 

 and antennae black, the latter with the four apical joints yellow. 

 The mandibles and palpi black. The wings dark brown, with a 

 violet iridescence ; the metathorax transversely striated ; the ab- 



