J* 



North American Hymenojptera. 231 



tip and at the extreme base: iarsz yellowish^ teriDinal 



joint black at tip, 



^ Thorax with a quadrate yellow spot on the middle- 



Leniith over three fifths of an inch. 



O 



The form of the abdomen is that of an Alomya, Panz. 

 but the wings are not remarkably short, nor are the an- 

 tennae convoluted. The markings of the metathorax are 

 much like those of L pcctoralisy Nob. 



11. I. reiiduusj Nob. (Contr. MacL Lye' p. T3) re- 

 sembles suturalisj Nob. but is much smaller, with tri- 

 colored antennae. 



orax 



Cryptus, Fab- 



1. C. orlus. Second cubital cellule incomplete; tho- 

 rax with two dorsal yellow lines. 



Inhabits Indiana. 



Body black : orhits and hypostoma white : t 

 with two lines on the disk and collar white : scutely trans- 

 verse line beneath it, and Hne each side at its base diverg- 



r 



ing towards the base of the wings, white: wings hyaline \ 

 nervures fbscous ; second cubital cellule small, rounded, 

 pentangular, the nervure of division from the third cellule 

 wantlntT ; metathorax whitish with about three black 



o 



abbreviated lines : abdomen long, tapering to the base ; 

 tergum with the posterior margin of the first and second 

 segments white; remaining segments more or less yel- 

 lowish: pleura white, with a black furcate line: pectus 

 and coxa white: feet honey-yellow: posterior feet 

 cox© with a black line ; tarsi white ; tibiae at tip 

 base blackish. 



Length less than one fourth of an inch- 



2. C. discitergus. Whitish varied with black ; ter- 

 gum black, disk white. 



and 



