154 PROCEEDINGS OF THE NATIONAL MUSEUM. 



PERICLISTA DILUTA (Cresson). 



Selandria (Monophadnus) diluta Cbesson, Trans. Amer, Ent Soc vol 8 

 1880, p. 12. •' > 



Isodyctium subgregarium Dyab, Journ. New York Ent. Soc, vol 6 1898 

 p. 134. 



A comparison of the type of subgregarium Dyar with the homo- 

 type of diluta Cresson revealed no specific differences. The two 

 species are therefore considered as synonymous. 



PERICLISTA CALIFORNICA, new species. 



PericUsta mutaUUs Ron web. Can. Ent.. vol. 43, 1909, p. 398. (Not Konow.) 



In the pale inner orbits this species is related to rileyi (Cresson)^ 

 but may be separated from that species by having the postocellar 

 furrow angulate anteriorly and by the acuminate sheath. 



Female.— L^n^h 4 mm. Anterior margin of the clypeus deeply, 

 arcuately emarginate, the lobes obtusely rounded apically; supra- 

 clypeal area uniformly convex; supraclypeal foveae deep, puncti- 

 form, not connected with the antennal foveae; middle fovea elongate, 

 open above; frontal foveae obsolete; antennal furrows complete; 

 ©cellar area uniformly convex; ocellar basin obsolete; postocellar 

 furrow angulate anteriorly; postocellar area narrowing posteriorly, 

 its anterior width subequal with its length ; postocellar line slightly 

 longer than the ocellocular line; lateral ocelli well below the supra- 

 orbital line; antennae filiform, fourth and fifth joints subequal; 

 stigma long, straight below, sharply oblique apically; anal cell of 

 the hind wings with a long petiole; sheath straight above, oblique 

 apically, slightly convex below. Yellowish; antennae except the 

 scape beneath, head above the antennae inside of the antennal fur- 

 rows and to the supraorbital line, spot on the prescutum. scutum, 

 metanotum and six basal tergites medianly, black; wings hyaline, 

 iridescent, venation pale brown ; costa and stigma yellowish. 



Type-locality.— ClsiYQwioni, California. Described from one fe- 

 male collected by C. F. Baker. 



Type.— Cat. No. 19040, U.S.N.M. 



PERICLISTA HICORIAE, new species. 



This species is closely allied to murtfeldtae Dyar, but may be dis- 

 tinguished from that species by having the apical margin of the 

 clypeus depressed. 



Female.— Length, 5 mm. Anterior margin of the clypeus arcu- 

 ately emarginate, the lobes obtusely rounded, the apical margin 

 depressed, the basal portion convex; supraclypeal area rectangular 

 in outline, uniformly convex; supraclypeal foveae elongate, deep,. 



