Descriptions of new species of Hymenoptera. 73 



line band hardly beyond the middle and an abbreviated 

 one nearer the tip; stigma pale ferruginous; inferior 

 tcings dusky, with a semifasciate on the middle with hy- 

 aline; oviduct black; pectus incisures black; posterior 

 tibix blackish at tip. 



Length two-fifths of an inch. 



11. I. morulus. Black; antennae with a white annula- 

 tion. 



Inhab. Indiana. 



Body black; antennae with a white annulation begin- 

 nin<>- at the tenth or eleventh joint and ending at the six- 

 teenth or seventeenth; wings violet-black; recurrent ner- 

 vures of the small cellule, with each a sallient angle; on 

 the anterior one a whitish dot and on the posterior one two 

 whitish dots; a dot also on the posterior nervure of the 

 small cellule; metathorax with elevated lines and each 

 side behind an acute angle; abdomen with a short petiole, 

 which is lineated; second segment opaque with confluent 

 punctures, larger towards the base; colour blue-black; 

 oviduct hardly obvious. 



Length three-fifths of an inch. 



Second joint of maxillary palpi dilated as in Peltas- 

 tes, Illig. 



12. I. residuus. Yellowish; antennae white in the mid- 

 dle and black at tip. 



Inhab. Indiana. 



Body yellowish, tinged with rufous; antenna not long- 

 er than the thorax, the 10 basal joints colour of the body, 

 11 to 1G whitish, the remaining joints black; wings hya- 

 line; central cellule pentangular; posterior tibise at tip, 

 and posterior tarsi, dusky. 



Length more than one-fourth of an inch. 



