IG [April 



9. Shiiiiim black: antennaj black, 24-jointed, 1st joint three times as long a^f 

 2nd: head polished, with furrows at sides of ocelli from aritennce to back of 

 head, eonnocted by a straight cross furrow : mandible long, sharp, bidentate : 

 one mandible with a small tooth between 1st and 2nd and the other with 

 merely a projection : a lunate spot on each side above ocelli, enclosed by two 

 larger lunate spots, which connect with a short inner orbital line, four ovate 

 parallel spots above antennae, a large spot on cheeks, nasus (with two inner 

 bla.ik dots), base of mandibles, palpi, tegulse, collar, a V on anterior lobe, a tri- 

 angular spot at base of each middle lobe of mesothorax and the summit of 

 scutel, pale straw color : abdomen yellow-rufous ; legs of three colors : the 

 coxae and trochanters black, femora white, tibiae and tarsi dark waxen ; eacli 

 of the four posterior tibias with two side spurs; wings ample, slightly clouded 

 at ends, marginal dividing nervure not coinciding with 2nd submarginal ner- 

 vuie, the ;5rd brachial cell with incomplete cross nervure. 



Rocky Mountains, Col. Ter. (Coll Ent. Soc. Philad.) One specimen. 



Genus XYPHIDRIA. 

 .'53. Xyphidria tibialis. Say. 



This specimen diticrs from Say's description in having whitish spots 

 upon the head. The antennae are black, 15-jointed, 8rd and 4th equal, 

 very slender toward the tip. There are two oval spots on the summit, 

 and a line, interrupted on occiput, around the outer edge of head end- 

 ing on the inner orbit, opposite antennae. In other respects this agrees 

 with that described by Say. 



Ohio. (Coll. Ent. Soc. Philad.) One specimen. 



Genus UROCERUS. 

 ;U. Urocerus Cressoni. n. sp. 



Black, the anteunaj tipped with white, the apex of abdomen rufous. (Long 

 0.()4, with ovipositor 0.86. Br. wings 1.24 in.) 



9 . Black : antennae 20-jointed, the ten apical joints straw color, the base of 

 the 11th and tij) of last joint brown; head and thorax coarsely punctured: a 

 rufous spot not defined at edges, back of the eyes at the sides of occiput: the 

 six basal segments of abdomen of a soft velvety purple-brown, the three apical 

 segments rufous: legs black, the base of posterior tibias and of 1st joint of their 

 tarsi white, remaining joints blackish, nails of all the tarsi red : wiugs ob- 

 scure brownish violaceous, nervures piceous. 



Pennsylvania. (Coll. Ent. Soc. Philad.) One specimen. 



The wings are more obscure than those of Urocerus a/bicorni^. 



