No. 22.] HYMENOPTERA OF CONNECTICUT. 379 



S. laeviventris (Osten Sacken). Synophrusf Iceviventris 

 Osten Sacken. 



Female : length approximately 2 mm. ; head reddish brown ; 

 vertex darker ; antennae brownish yellow, second joint not much 

 shorter than the fourth, the third about one-third longer than 

 the fourth, the fourth, fifth and sixth joints about equal in length, 

 the fourteenth or apical joint somewhat less than one and one- 

 half the length of the preceding ; thorax black, shining and finely 

 rugose, punctate and pubescent; scutel gibbose, with a slight, 

 sharp, recurved, elevated margin ; thorax and scutel may be 

 brownish or reddish brown; parapsidal grooves distinct their 

 whole length; foveae at base of scutel distinct; pleurae black or 

 brownish, polished under the wing, scratched below, punctate 

 anteriorly; legs brownish yellow, except extreme tips of tarsi, 

 which are more or less brownish ; the hind tibial and tarsi may 

 be somewhat inf uscated ; wings hyaline, veins pale, areolet almost 

 wanting, with only the second transverse vein or its outer portion 

 at all distinct; abdomen with its first dorsal segment striate, its 

 second dorsal segment covering all of the following segments and 

 chestnut-brown or black, ovipositor sometimes exserted. 



S. oneratus (Harris). Cynips oneratus Harris. 



Length 3-3.5 mm. ; color variable, middle of the thorax and 

 of the head with a black stripe of greater or less extent, though 

 in some specimens there is no black at all on the head, and the 

 stripe on the thorax may be obsolete ; third and fourth joints of 

 the antennae nearly equal in length and much longer than broad, 

 fourth joint a little shorter than the third, the following joints 

 subequal, except the thirteenth joint, which is about twice as long 

 as wide, and the fourteenth or apical joint, which is about one and 

 one-half times the length of the preceding. 



S. lignicola Osten Sacken. S, rhoditiformis Walsh. 



In this species the pronotum has a brown or black spot in 

 the middle, which is more or less extended, being sometimes 

 confined to a narrow brown line in front of the angle formed by 

 the mesonotum anteriorly, and sometimes extended into a large 

 black spot which crosses in some individuals to its fellow; the 

 sternum is black, and the middle coxae not inserted on yellow 

 sockets ; the ventral valve is not always of a highly polished black, 

 but sometimes pale. 



