PROC. ENT. SOC. -WASH., VOL. 50, XO. 6, JUNE, 1948 l-l-O uotum, constricted medially, very barely transversely rugulose. Slope of the propodeum rather low and even ; median line lightly impressed. Anal vein of hind wing meeting the median slightly before the origin of the cubitus; transverse median of forewing meeting the median slightly beyond the origin of the basal vein. Marginal cell short, nearly twice its length from the wingtip, radial vein nearly evenly arcuate. Second submarginal cell larger than the third, 1.25 times as broad as high, narrowed by .4 above. Third submarginal cell .8 times as wide as high, narrowed by .4 above. Abdomen cylindrical; penultimate visible sternite, broadly rectangular-ly emargmate. Subgenital plate (Fig. 1) very narrow, its margin fringed with hairs; basal palpus-like structures short-haired; basal plate less broad than in jajci)itoensis, more rounded cau^ad. Genitalia (Fig. 2) with the parameres rather long, exceeding the volsellae; volsellae with the digitus subspatulate, A\-ith a row of hairs at the apex which are shorter than in jacintoensis ; parapenials simple, stout; aedeagus equal-ling the parameres in length, its margins sinuate, not abruptly expanded apically. Allotype. — Male ; Medicine Hat, Alberta, Canada, Jnly 5, 1940 (J. L. Carr) [University of Alberta; type will be de-posited in the Canadian National Collection, Ottawa]. NOTES ON NOMENCLATURE IN THE LATHRIDIINI (COLEOPTERA, LATHKIDIIDAe) By Luex,la M. Walkley, Washington, B. C. Several nomenclatural problems became evident in the course of the systematic arrangement of the specimens in the Melville H. Hatch collection of Lathridiidae of the State of Washington belonging to genera of the tribe Lathridiini. These are due mainly to the acceptance of invalid type desig-nations or to lack of type designations. Study of the other genera of this tribe and of other tribes in the Lathridiidae may well bring to light further need for clarification of the nomen-clature as it now exists in this family. Since Westwood, in 1840, (p. 14), designated Tenehrio lar-darius Deg. as type of Latridius Herbst (later correctly emended to Lathridius), the generic concept thus established has been followed. Westwood 's designation, however, is in-valid since L. lardarius was not originally included in Lathri-dius. Latreille's designation of Latridius porcaius Herbst in 1810 (p. 431) is valid; but this species is a synonym of La-thridius minutus (L.) which is the type of Conithassa Thom-son, 1859 (p. 93), by monotypy and original designation. Conithassa is, then, a synonym of Lathridius Herbst (isogeno-
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