No. 22.] HYMENOPTERA OF CONNECTICUT. 75I 



2. Scutel swollen; head beneath smooth, shining, impunctate, 

 edge of cheeks beneath with a row of long incurved hairs; 



clypeus with a median raised line truncatus 



Scutel convex; head beneath punctate, long, pilose; clypeus 

 without a raised line productus 



Males. 



1. Fourth to twelfth antennal joints broader than long, apical 



joint produced to a point; sixth dorsal abdominal seg- 

 ment with lateral apical spines 2 



Fourth to seventh antennal joints dilated, eighth and ninth 

 broader than long, tenth to thirteenth longer than broad; 

 seventh dorsal abdominal segment rounded, a little dilated, 

 foveate; first ventral segment produced to a spine, second 

 broad and concave, fourth with visible apical lateral angles 



cylindricus 



2. Seventh dorsal abdominal segment not broadly rounded .... 3 

 Seventh dorsal abdominal segment broadly rounded, second 



ventral segment longest, with a transverse subapical ridge 



truncatus 



3. Seventh dorsal abdominal segment produced into a spine; 



second ventral abdominal segment with a great tooth-like 



process productus 



Seventh dorsal abdominal segment produced into a stylus 

 which in outline is finger-shaped; second ventral abdominal 

 segment simple, convex, somewhat swollen pilosifrons 



*A. (Andronicus) cylindricus Cresson. 



Farmington ( ?). 



A. (Alcidamea) truncatus Cresson. 



New Haven, 28 June, 1902 (E. J. S. M.) ; West Thompson, 

 12 July, 1905 (H. L. V.). 



A. (A.) productus Cresson. 



New Haven, 24 June, 1902 (E. J. S. M.), 17 June, 1905 (H. 

 L. V.) ; Poquonock, 2j June, 1905, West Thompson, 12 July, 

 1905 (H. L. V.). 

 *A. (A.) pilosifrons Cresson. 



Heriades Spinola. 



A single species of this genus occurs in the State, and this, 

 like allied forms, is black and covered with pale pubescence. 



H. (Trypetes) carinatus Cresson. 



Female with the lower border of the mandibles simple, not 

 sinuate; clypeus emarginate, its sides with two or three denticles. 



