THE CANADIAN ENTOMOLOGIST. 51 



however, readily distinguished by the narrow, non-ciliated wings, and the 

 color of the first abdominal segment. 



Pentacantha, n. g. 

 This genus is closely related to Prosacantha Nees and Trisacantha 

 Ashm.; but is at once separated from them by having five spines on the 

 metathorax, three short ones on the disk and one long one on each side ; 

 and besides, there is a short, smooth, blunt horn at the base of first seg- 

 ment, partly prolonged over the metathorax. Its other characters are 

 exactly as in Prosacant/ia. The blunt horn issuing from the base of first 

 segment would seem to indicate a relationship with Inostemma Haliday, 

 but that genus is in another sub-family. 



(8) Pentacantha Canadensis, n. sp. 



Female. Length .08 inch. Polished black ; thorax opaque. Head 

 smooth, except some lines back of eyes and on occiput. Antennae 12- 

 jointed, brown ; first funiclar joint twice as long as the pedicel; second 

 two thirds the length of first ; third about as long as wide ; fourth shorter 

 than wide ; club large, six-jointed. Thorax and scutellum rather coarsely 

 rugose ; no parapsidal grooves. Legs, including anterior coxae, honey- 

 yellow, middle of femora and tibiae obfuscated. Abdomen polished 

 black, the third segment longest and widest ; first and second segments, 

 and the third excepting on its disk, longitudinally striated. Wings dusky- 

 hyaline, venation as in Prosacantha, veins rufo-piceous. 



Described from one specimen. 



Sub-family Platygasterin.*:. 

 Metaclisis Forster. 



(9) Metaclisis crythropus, n. sp. 



Female. Length .08 inch. Black. Head opaque, coarsely rugose 

 on vertex and back of eyes. Antennae 10-jointed, the terminal joints of 

 funicle enlarged into an irregularly rounded club ; club six-jointed, fili- 

 form Thorax shining, finely reticulated or scaly ; parapsidal grooves 

 distinct, converging and meeting at the base of the scutellum. Legs red. 

 Abdomen polished black. Wings dusky hyaline. 



Described from one specimen. 



Ectadius Forster. 



(10) Ectadius Canadensis, n. sp. 



Female. Length . t 2 inch. Polished black. The head is delicately 



