288 THE CANADIAN ENTOMOLOGIST. 



and />erdifus one would be led to believe they were synonyms, but the 

 two types are quite different. Segregatus may be known by the trans- 

 lucent, very narrow, lanceolate stigma, while the stigma of perdittis is 

 broad, triangular and opaque. The tegulee are white in segregatus^ black in 

 perditiis.. 



Cryptus perditus has only one wing remaining, but is apparently a 

 Hemiteles. 



Cryptus mellipes = Cryptus alacris, Cress. 



Cryptus sordidiis = Cryptus extrematus, Cress. 



Cryptus /ongicaudus, O K. — The tegulae are black instead of white. 



Cryptus ignotus, O K. 



Cryptus pe?itagonalis, $ and $ O K. 



Hemiteles gigas = Platylabus. 



Hejniteles declivus, O K. 



Hemiteles aciculatus, O K. — The description of colour markings is 

 faulty. The nervures and stigma are brown ; the posterior cox?e with the 

 basal joint of the trochanters are black ; the extremity of the tibiae and 

 tarsi is dusky ; abdominal segments 3 and 4, except at the sides, with a 

 part of 5, and 2 at the apex, red. 



Hemiteles deb His, O K. 



Mesoste7ius armatus, O K. — The areolet being open behind would 

 place it in Foerster's genus Otacustes. There are some of Mr. Cresson's 

 species that also belong here. 



Mesostenus latigaster = Tryphon. 



Mesostefius pluricinctus is not a Mesostenus. The oblique, slightly 

 petiolate areolet would lead one to place the specimen with the Try- 

 phoninse, but the long ovipositor, curved petiole and general form place 

 it nearer the Cryptinfe, where Provancher placed it. By the lunulas, 

 Foersler would place the specimen in his Phygadeuonidse, and by the 

 spiracles being in the middle of the petiole, it would belong to his genus 

 Diacritus. Provancher's description of the species is not very complete. 

 Points that might be added, besides those given above, are : Lower 

 edge of clypeus, a small dot at the base of each antenna beneath, and a 

 line beneath the primary wings, yellowish-white ; a short, transverse 

 median ridge on posterior part of metanotum ; ovipositor nearly as long 

 as abdomen ; posterior coxae and trochanters as long as or loilger than 

 the femora ; claws large ; front tibial spurs large and curved. The longi- 

 tudinal caringe on the metanotum, of which Prov. speaks, are so very 



