302 THE CANADIAN ENTOMOLOGIST. 



Tetrastichus blepyri, sp. now — ° . Length, 0.8 mm. Black, shining, 

 impunctate, except some punctures in the parapsidal furrows ; in one 

 specimen the rnesonotum is blue-black ; the middle grooved line on the 

 mesonotum is nearly obsolete, wanting posteriorly ; metanotum smooth, 

 with a median carina ; the scape, the extreme apex of the pedicel, the 

 tegulae, the apices of the femora, and all tibiae and tarsi, are yellowish 

 white. Wings hyaline, the veins light brown. The abdomen is ovate, 

 depressed, and very little longer than the head and thorax united. 



Type.— Cat. No. 6605, U. S. N. M. 



Hab. — New Mexico : Roswell. 



Host. — Hym.: Blepyrus phenacocci. 



Xanthoencyrtus, gen. nov. 



This new genus, on account of the very short marginal vein and the 

 arrangement of the ocelli, comes near to Psylhephagus, Ashm. The two 

 genera may, however, be separated as follows : 

 Lateral ocelli not close to the eye margin. 



Yellow : pedicel more than twice as long as the first funicle joint ; all 

 funicle joints wider than long ; club rather large, 



stout Xanthoencyrtus, gen. nov. 



Aeneous black or metallic ; pedicel not twice as long as the first 

 funicle joint ; not all the funicle joints wider than long ; club 

 neither so large nor so stout Psyllsephagus, Ashm. 



Xanthoencyrtus nigroc/avatus, sp. n. — $. Length, 16 mm. Yellow; 

 the legs and the sutures of the abdomen yellowish white ; eyes and club 

 of antennas brown-black ; scape above more or less, the pedicel basally 

 and the first four joints of the funicle light brownish, the tip of the pedicel 

 and the fifth and sixth funicle joints yellowish white. Wings hyaline, 

 finely pubescent, but with an oblique hairless line from the marginal vein; 

 the marginal and postmarginal veins are punctiform, while the stigmal 

 vein is moderately long, with a slight upward curve. 



Type.— Cat. No. 6606, U. S. N. M. 



Hab. — Indiana ; Princeton (Prof. F. M. Webster). 



Mailed November nth, 1902. 



