84 THE CANADIAN ENTOMOLOGIST. 



Virginia; Illinois. This may be the male of dentines, Brulle, the 

 female of which is described as having a white annulus on antennae, and 

 the tarsi are not conspicuously white as in albitarsis. 



4. Helcon frigidus. N. sp. 



% . — Black, shining ; face rough ; antennae slender, black ; prothorax 

 except posterior angles, semi-circular band on pleura, disk of meso- 

 thorax and basal excavation of scutellum, covered with coarse striae or 

 reticulations ; metathorax coarsely reticulated ; tegulaa piceous ; wings 

 smoky hyaline, nervures and stigma black ; legs, including coxae, rufo- 

 ferruginous, tarsi tinged with yellowish, posterior tibiae blackish, femoral 

 tooth strong and very blunt ; abdomen longer than thorax, narrow,, 

 polished, ferruginous, dusky at base, first segment with two longitudina.1 

 ridges and a stout blunt tubercle on each side near base ; ovipositor 

 longer than body, honey-yellow, sheaths black. Length .45-.50 inch. 



Hudson's Bay; Vancouvers' Island (Henry Edwa.rds.) 



5. Helcon americanus. N. sp. 



5 . — Black, shining ; face roughened ; prothorax and metathorax 

 reticulated ; labrum and mandibles except tips ferruginous ; palpi pale 

 yellowish ; antennae long and slender, brown-black, base honey-yellow ; 

 middle lobe of mesothorax prominent, divided from the side lobes by a 

 deep groove which become confluent behind ; tegulae and base of wings 

 honey-yellow ; wings hyaline, sub-iridescent, nervures and stigma black ; 

 legs honey-yellow, posterior tibiae and tarsi more or less dusky, femora 

 simple ; abdomen long, slender, shining, sides and base of second and 

 third segments tinged more or less with testaceous, first segment long, 

 narrow, grooved medially ; venter more or less tinged with testaceous ; 

 ovipositor very long and slender. Length .5 5-. 60 inch. 



Canada ; Virginia. Very distinct from fulvipcs by the shape and 

 sculpture of the first abdominal segment. 



6. Helcon fulvipes. 



Helcon fulvipes, Cress., Proc. Ent. Soc. Phil., iv, p. 292. £ . 

 Colorado. 



