388 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 41. 



broad, obtuse; supraclypeal area shining, convex, triangular in out- 

 line; middle fovea small, deep, circular, extending over the antennae; 

 crest very poorly defined, antennal furrows continuous ; ocellar basin 

 with the lateral walls rather sharp ; postocellar furrow wanting; post- 

 ocellar area rather strongly convex, the lateral furrows curved, broad- 

 ing posteriorly; antennae slender, the third joint a little shorter than 

 fourth; stigma broad, angulate near base, tapering to apex; third 

 cubital cell not a third longer on the radius than the length of the 

 third transverse cubitus; abdomen as in ocreatus. Reddish-yellow; 

 antennae, interocellar area, and on lateral lobes black or piceous; 

 pronotum and tegulae pallid; venation dark brown, stigma and costa 

 yellowish. 



The mesonotum in some specimens is all piceous. 



Male. — What seems to be the male, as it bears the same label, 

 shows remarkable antigeny. Length 7.5 mm. Head not strongly 

 expanded behind the eyes; head as in female except the frontal crest 

 which is broken, and the indistinctly present postocellar furrow; 

 stigma not as angular as in female; procendia twice as long as wide, 

 truncate; hypopygidium very long and narrowing apically where it 

 is truncate; gentalia stipes large, long, exceeding the hypopygidium. 

 Black; clypeus, mandibles (apices piceous), face beneath antennae, 

 posterior orbits narrowly below, tegulae, angles of pronotum, and coxae 

 beneath pallid; legs below trochanters, except the posterior tibiae and 

 tarsi, abdomen except basal plates, apical dorsal segment, hypopy- 

 gidium and gentalia reddish. Wings hyaline, iridescent; venation 

 and stigma dark brown. 



Grand Island, Michigan. Reared from larvae collected on spruce, 

 July 28, 1907, by A. D. Hopkins. 



Type.— Cat. No. 13996, U.S.N.M. 



SELANDRIDEA, new genus. 



Belong to the Selandrinae as defined by Doctor MacGillivray, In 

 Konow's classification it runs to Selandria. From Selandria in the 

 restricted sense it may be separated by the broad malar space, the 

 eyes not or scarcely converging to the mandibles, the head being twice 

 as broad as high, and the costa and subcosta being connected by 

 chitin. 



Genotype. — Selandridea vanduzeei Rohwer. 



Selandria decorata Cresson should be placed here, and it may be that 

 the European Tenthredo jlavescens Klug will belong here. 



Table of species. 



Pleurae largely pale ; lateral ocelli in the supraorbital line vanduzeei. 



Pleurae black; lateral ocelli well behind the supraorbital line decorata. 



