Descriptions of new species of Hymenoptcra. 79 



Inhab. Indiana. 



Body polished; head green with a violaceous reflection, 

 each side before vertically striate; occiput transversely 

 striate; antennae, flagcllum fuscous; thorax transversely 

 and longitudinally striated, violaceous, the collar punctu- 

 red, green; scutel much elongated, entire; ivings dusky 

 on the apicial half; abdomen very short, wide, triangu- 

 lar, very convex above and beneath; anterior half, viola- 

 ceous, posterior half, green with a violaceous reflection; 

 tarsi yellow. 



Length one-fifth of an inch. 



2. P. hyalinus. Green; wings hyaline. 



Inhab. Pennsylvania. 



Body green, punctured; scutel much, elongated, slight- 

 ly emarginate; wings hyaline, immaculate; abdomen 

 very short, wide, triangular, very convex above and be- 

 neath, violaceous; tarsi yellowish ; anterior tibiae honey - 

 yellow. 



Length less than one-fifth of an inch. 



Differs from the preceding in being destitute of the 

 dusky wing tips and in having punctures instead of striae. 



SPALANG1US, Latr. 



S. politus. Bluish-green; tcrgum with a cupreous 

 band at base. 



Inhab. Virginia. 



Body bluish-green, varied with violaceous, densely 

 punctured; front grooved to receive the basal joint of 

 the antennae; flagellum fuscous; ivings hyaline, slightly 

 dusky; scutel somewhat prominent; abdomen a little 

 depressed; first segment brilliant cupreous; incisures 

 glabrous; terminal segment longer than the others to- 

 gether, forming at tip a narrowed, carinated black pro- 



