THE CANADIAN ENTOMOLOGIST. 169 



Associated witli the three encvrtinines reared herein IlHnois, however, 

 were found certain chalcidoids of the family Pteromalidte, tribe Pachy- 

 neurini, genus Pachyneuroti Walker, and of the family Eulophidae, 

 subfamily Tetrastichinoe, genus Gyrolasia Foerster, which are perhaps 

 secondary in their relations, or may have come from some syrphid larva 

 in among the hosts. The first was Pachyneuro?i micans Howard, and the 

 second an apparently undescribed species of the eulophid genus mentioned 

 (but without long marginal fringes of the fore wings), allied with 

 ( SyntomospJiyriim) Gyrolasia esuriis (Riley), differing from that species 

 in having more slender veins in the fore wing^. For the present it is kft 

 undescribed. These two species are not listed below (Accession Nos. 

 44. 226 and 44,22'j-, Illinois State Laboratory of Natural History, Urbana, 

 Illinois, two males, one female and two females respectively, all on tags, 

 and a slide for each species). 



For the authoritative identification of the host I am indebted to 

 Professor T. D. A. Cockerell, University of Colorado, Boulder, Colorado. 



Family ENCYRTID^E 



Subfamily Encyrtin.e. 



Tribe Ectiromini. 



Cristatiihorax, genus novum. 

 Normal position. 



Female. — Head lenticular, not quite as wide as the thorax at its 

 widest point, the facial impression rather small, not prominent, its caudal 

 margin acute, yet not sharply defined by an arched carina, the convexed 

 discal portion with moderately large, scattered punctures, bearing setae ; 

 scrobes short, forming a semicircle ; face between the eyes and the vertex 

 hexagonally sculptured or rugose, the eyes margined with a row of 

 moderately la»-ge punctures, each puncture giving origin to a single grayish 

 seta ; impression of the face from cephalic aspect (natural position) 

 elliptical, less than one-half the length of the head ; face beneath the eyes 

 glabrous ; vertex rather narrow, the eyes somewhat convergent above, the 

 lateral ocelli touching the eye margin, the ocelli in an acute-angled triangle; 

 cheeks finely rugose ; antennae inserted at the clypeal border, compressed, 

 clavate, with no sharp demarkation between the funicle and club, the 

 flagellum gradually enlarging, the scape slightly dilated towards apex, the 

 funicle 6-jointed, longer than the club, and with the first joint shorter than 

 the pedicel ; mesothorax finely reticulated, with a squammose appearance. 



