NORTH AMERICAN IIYMENOl'TERA. ] 57 



OXYC'IIIA Ilaliday. 

 This genus is the same as (J(illaApidi<t Dahlhoin. 



57. Oiiycllia l»rovaiicUcri Ashm. (Ciillusiiidia, Prov. Add. Faun. Ilyiii. 

 1C7) — 9 • Length .18 inch. Head and thorax hhiek, o])aque, transversely runrii- 

 lose. Head with very coarse, transverse rngosities, covered with a whitisli pu- 

 bescence on face, cheeks and surrounding mouth parts; a pit in front of each 

 lateral ocelli ; eyes long oval, brown ; antennse 13-jointed, filiform, rufous; third 

 and terminal joints longest, about equal in length, first obconic, second globular, 

 both black, the third at base is also more or less black ; thorax transversely ru- 

 goso-punctate, parapsidal grooves distinct, with a median carina; prothorax 

 appearing as a carina at sides, scutellum rufous, very large, elevated posteriorly 

 and extending slightly over the metathorax with two broad, deep, longitudinal 

 channels its whole lengtb, the bottom of which are covered with transverse ru- 

 gosities; metathorax at sides and coxie i)uboscent. Legs rufous, femora along 

 upper edges ol)fuscated ; the posterior tibise have two apical spines, a broad longi- 

 tudinal groove beneath and one not so broad above; the basal tarsal joint is 

 cylindrical and as long as all the others combined. Wings hyaline, with an open 

 mai-ginal cell. 



Hub. — Cap Rouge, Canada. 



This species was sent to me by Abbe Provancher, in honor of 

 whom I take pleasure in dedicating the species. 



It seems very closely retated to the European Onychia (Callaspidia) 

 Diifouri Giraud, but I cannot but think it a distinct species. 



ACOTHYREUS n. g. 



This genus is founded upon one S specimen captured at large 

 some years ago. It is closely related to Anacharis Dalman, by its 

 long petiolated abdomen, but easily .separated by its much higher 

 cone-shaped, rugose, non-foveate scutellum and a gradually declining 

 rugose metathorax ; the antennae are long, the joints closely con- 

 nately united, 14-jointed ; the mesopleune are polished, divided by a 

 longitudinal groove ; the abdomen is ovate, not compressed and ob- 

 tuselv rounded at apex, in Anachnrh it is i)()iiite(l ; the petiole is very 

 long and smooth ; the marginal cell is closed triangular, the arcolet 

 a callous dot ; no other cells. 



The thorax, head and autenniie in this genus resembles Amb/i/jiofnn 

 somewhat, but the hnig petiole of abdomen and venation of wings 

 easily separate it. 



5S. Ai'otliyreiiN osoeola n. sp.— 'J,.— Length .13 inch. Black, shining; 

 antenna' and legs yellowisb. Head subquadrate. finely punctate ; occiput smooth, 

 face rather densely covered witb wbitisli pubescence, ocelli prominent, almost 

 on a .straight line, the front one being but slightly in advance of tlie otliers; 

 anteniiif 14-joiiited. very loiiu, first joint black ; thorax irregularly rugose aiiove 



