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 Article III.—NEW PACIFIC COAST CYNIPIDÆ

During 1919 and 1920, while a Sheldon Travelling Fellow of Harvard University, I had an opportunity to make a considerable collection of Pacific Coast gall-wasps. The new species and varieties of this paper constitute only a small part of the undescribed material in the collection. It is safe to say that not fifty per cent of the Pacific Coast gall-making Cynipidæ have yet been reported. This will not appear strange when it is realized that the region constitutes a very distinct faunal area and that, with the exception of Miss Rose Patterson's rather small collection made mostly about Stanford University (and studied by Fullaway), there are no published accounts of systematic collecting of Cynipidæ from the region.

Generic names in this paper follow the scheme I have used before: “Andricus” is a meaningless name and does not necessarily express natural relationships of the species thus labelled; other generic names used appear to designate truly phylogenetic groups.

Acknowledgment of aid in my work with Pacific Coast Cynipidæ is due the Harvard University authorities and especially Dr. William Morton Wheeler, of the Bussey Institution of Harvard University, to whom I am indebted for the Fellowship which made the collecting trip possible; to Mr. S. B. Parish, then of San Bernardino, California, for material help in learning to distinguish California plants, particularly oaks; and to Mr. W. H. Vance who has assisted in the tedious but all-important work of mounting my material for study.

The holotypes of all these species are in The American Museum of Natural History; paratypes are in that museum and elsewhere as indicated for each species. All specimens of these species labelled cotypes should be considered paratypes.

Andricus atrimentus, new species

Black; thorax largely smooth; median, anterior parallel, and lateral lines absent; arcuate groove at base of scutellum; female abdomen produced dorsally, male abdomen small, pedicellate; areolet moderately small.

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