36 HYMENOPTERA. 



as in T. acuminatum without, however, the small blotch beneath the 

 stigma; veins brownish ; tegulse white. 

 Described from two specimens." p. 107. 



This species was first known to me in 1909 when I cap- 

 tured several females on a window at Centralia, Illinois and 

 upon them based this new genus. Subsequently other speci- 

 mens were received as listed beyond but not until very 

 recently was I able to connect these specimens with niger ; 

 this was done by means of the specimens from the National 

 Museum also listed later. These specimens were not types, 

 not designated as such, but were simply labelled " Tricho- 

 gramma nignmi Ashmead" and were mounted on a card with 

 a small piece of a corn leaf, part of the midrib showing exit- 

 holes like this parasite would make under such conditions. 



For obvious reasons it is redescribed : 



Normal position. 



Female. — Length, 0.75 mm. ; moderate in size for the subfamily ; 

 easily visible to naked eye. 



General colorshining black, the legs pallid yellow. Antennse, coxae, 

 portions of femora, lateral aspect of tibiae, distal tarsal joints, head, 

 venation, tegulae, base of the abdomen dorsad and metanotum sordid 

 or dusky yellowish ; parapsidal furrows bordered with some yellowish ; 

 mandibles fuscous. Fore and hind wings hyaline. Eyes and ocelli 

 dark reddish, the former clothed with sparse hairs. 



Sculpture of most of the body inconspicuous, the scutellum and gense 

 finely, longitudinally striate ; pubescence sparse, long rather stiff setae ; 

 of the six regular, longitudinal (disto-proximad) radiating rows of 

 the discal ciliation of the fore wing, the first or cephalic line is short- 

 est (about from 7 to 11 cilia) and proceeds from a point just disto- 

 cephalad of the nipple of the stigmal vein straight disto-cephalad to 

 the cephalic wing margin ; it is not much longer than the stigmal vein ; 

 the second row is near the first and nearly a third longer, converging 

 slightly distad in relation to it and proceeding from a point directly 

 beyond the nipple of the stigmal vein ; it is distinctly paired. The 

 third row of cilia is an opposite of the fourth, distant from the second, 

 slightly concave and proceeding nearly directly distad to the apical 

 wing margin before reaching which it curves slightly disto-cephalad ; 

 it has its origin at the apex of the stigmal vein ; the fourth is near the 

 third but proceeding in an opposite direction, disto-caudad to the 

 apical wing margin ; it is also curved proximad, not reaching the 

 apex of the stigmal vein ; the fifth line has an analogous, but not a 

 similar, position to that of the second ; however, it is somewhat shorter, 

 convexly curved, less distinctly paired, originates at or proceeds from 



