Traces to section 77 in Muesebeck's key (Proc. U.S.N.M., LVIII, 493, 1920) but differs from all species falling under that section as follows: at once distinguished from etiellae and cassianus by having the ovipositor sheaths as long as abdomen; differs from victoriae in having the wings clear hyaline and from monticola which it appears to resemble more closely, in being somewhat larger, with scutellum impunctate, propodeum without a trace of a median carina and the radius of fore-wing uniting with transverse cubitus in a rounded obtuse angle.

The species considered below are those which are listed in Leiodes in the Leng Catalogue of Coleoptera and which were treated under the name Liodes by Horn (1880, Trans. Am. Ent. Soc. VIII, 296). Since the appearance of Horn's synopsis, they have been neglected, and only one species, interstrialis Hatch, has been described. In the following synopsis, three species are described as new, several changes in nomenclature are suggested, and a number of important characters not noted by Horn are described.

There has been much said, pro and con, on the species known as Euphydryas editha Bdv., and its forms, but it seems that the last word is still unspoken.

For several months I have been working on the problem presented by this group, and it seems that the race found in the San Francisco Bay region has, by oversight, never been recorded. My attention was also drawn to this fact by Dr. McDunnough of Ottawa, to whom must go the credit.

Length 6 mm.; reddish yellow; beak, antennae, ovipositor sheaths, apices of hind tibiae, and posterior tarsi, dark.

Female—Head: face long, rostriform; malar space five-sixths eye height; face in profile slightly impressed in middle; apices of antennal plates forming a low elevation. Slight groove between antennal plates. Lateral ocelli slightly further from each other than from median ocellus. Ocell-ocular line three times the diameter of a lateral ocellus. Margin of frontal impressions well developed, highest opposite middle of median ocellus, continuous to lateral ocelli. Face very sparsely punctate, shining.