54 THE CANADIAN ENTOMOLOGIST. 



honey-yellow, anterior pair pale, posterior tibiae white, tips and a spot 

 near base black, their tarsi black, white at base ; abdomen polished 

 black, second and sometimes base of third segment honey-yellow. Length 

 .16-18 inch. 



Massachusetts ; Pennsylvania ; Illinois. Easily recognized by the 

 white posterior tibiae annulated with black. It is closely allied to the two 

 preceding species. 



MlCRODUS EARINOIDES. N. Sp. 



°. . — Small, slender, shining black ; mouth pale piceous, palpi whitish ; 

 metathorax rugose, sub-opaque; tegulae honey-yellow; wings hyaline, iri- 

 descent ; legs honey-yellow, posterior tarsi whitish, apex and spot near 

 base black, their tarsi black, whitish at extreme base : abdomen black, 

 depressed, polished, basal sutures of second and third segments sometimes 

 pale. Length .15 inch. 



Massachusetts ; Illinois. Resembles Earinus limitaris in miniature. 



Genus Earinus, Wesm. 



Earinus limitaris. 



Bassus limitarsis, Say, Bost. Jour. Nat. Hist.,i., p. 250. 



$ $ . — Black, shining, with a short pale silky pile on face, pleura and 

 metathorax ; mesothorax not trilobate, feebly punctured ; metathorax 

 rounded, shining, disk with a narrow longitudinal groove ; tegulae whitish ; 

 wings hyaline, iridescent, costal nerve and stigma black, nervures fuscous, 

 areolet quadrate ; legs honey-yellow, posterior tibiae pale, apex broadly 

 and a narrow annulus near base black, their tarsi entirely black ; abdomen 

 narrow, depressed, polished, second segment with an oblique groove on 

 each side behind which is a round swelling ; sheaths of ovipositor thick, 

 fringed with short dense black pubescence. Length .25-35 inch. 



Canada ; Mass. ; Penn. ; Virginia ; Illinois. Common. 



