674- BOSTON JOURNAL 



Ohs. The name of Cri/ptus, applied by Jurine to one of his 

 genera, has been previously appropriated by Fabricius to a genus 

 of Ichneunionides, and is altogether synonymous with ITijlotoma 

 of Latreille, which is the anterior designation. It includes spe- 

 cies of at least three genera, all of which are distinguished by 

 tri-articulate antennae. It may be thus divided, with modified 

 characters. 



Hylotoma Latr. — Eadial cellule appendiculated : four poste- 

 rior tibiae with a spine on their middle. 

 H. rosse F. 



Atomacera nob. — Eadial cellule simple ; tibiae destitute of a 

 spine on their middle. 



Cryptus Jurine (by error.) — Antennse of the male biparted : 

 tibioe destitute of a spine on their middle. 



C.fnrcata F. C. KJiigii, Leach, &c. 



1. A. DEBiLis. — Black ; tibiae whitish. 

 Inhabits Indiana. 



% Body black, polished : antennae, cilise longer than the trans- 

 verse diameter of the antennse : mouth dull piceous : wings fuli- 

 ginous, a little paler at tip ; first and [213] second cubital cellules 

 confluent : tibiae, anterior pair dull pale yellowish. 



Length three-twentieths of an inch. 



2. A. cellularis. — Black ; abdomen rufous. 

 Inhabits Indiana. 



9 Body black, polished : antennae distinctly and rather densely 

 ciliated with hairs, which are a little shorter than the transverse 

 diameter of the antennae : nasus, labrum and palpi whitish : 

 wings dusky violaceous ; cubital cellules three ; the second very 

 small, hardly one third the length of the first, and but little 

 wider at its tip than at its base : abdomen entirely yellow-ru- 

 fous : feet, coxae, trochanters and small base of the tibije, whitish ; 

 anterior pair of tibise dull whitish. 



Length less than one-fourth of an inch. 



o 



Much smaller than Iljlotoma abdominalis Leach, which it 

 probably resembles. 



[Vol. I. 



