442 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 57. 



This is one of tlie commoner western species and varies from the 

 typically colored form to a form with reddish propodeum and reddish 

 spots on the mesoscutum. 



Vancouver Island (Cresson); Easton (Koebele), Hoquiam (Burke), 

 Washington; Waldo, Oregon (Sargent); Big Tree Grove, Mariposa 

 County, California (Burke). 



Host. — According to the unpublished notes of the Branch of 

 Forest Insects, Bureau of Entomology this species is parasitic on 

 Hyloti-upes ametliystinus, Hylotrupes ligneus, Tetropium cinnamo- 

 pterum, Tetropium velutinum, Melanophila drumnondi, and Atimia 

 dorsalis. 



XORIDES EASTONI (Rohwer). 



Xylonomus ( Afoerophora) eastoni Rohwer, Proc. U. S. Nat. Mua., vol. 45, 1913, 

 p. 356. 



Type.— C^t. No. 15368, U.S.N.M. 



This species is known from the miique type and has a small yellow 

 spot on the hiner orbits, a character overlooked in the original 

 description. 



Fall River, Massachusetts. 



Group STIGMAPTKRUS. 



Group characters. — Facial quadrangle wider than long, in some 

 species markedly so while in others the width is but little greater 

 than the length ; face coarsely punctured or coriaceous; frons closely 

 punctured; vertex closely punctured (in some species the punctures 

 are separated by a distance somewhat greater than the diameter of 

 an ocellus) or punctato-striate ; posterior orbits with oblique striae; 

 antennae of male nearly bare; angles of pronotum prominent but not 

 dentate; abdomen dull or shining, closely or sparsely punctured, an- 

 teriorly and posteriori}^ more or less striate; propodeum coriaceous, 

 carinae strong, angles variable; basal area and areola confluent; 

 first tergite in female two to four times as long as apical width, with- 

 out median dorsal carinae, with a more or less complete carina from 

 spiracle to apex; second tergite in female longer than apical width, 

 in some species (stigmapterus, etc.) distinctly so while in others 

 (catomus) the difference between length and width is not great; base 

 of third tergite in male without or with only incomplete depressed 

 areas laterally; basal tergites coriaceous, granular or transversely 

 aciculate; nervulus slightly postf ureal; nervellus perpendicular or 

 reclivous, broken at about middle; ovipositor longer than body. 

 Black or ferruginous; legs with white markings; wings hyaline to 

 brownish, antenna of female with a pale annulus. 



The species of this group are closely allied and in the ferruginous 

 species this color is often partly replaced by black. As far as the ma- 

 terial is available the species can easily be distinguished by the above 

 table, but males of all of the species are not at hand, and it will prob- 



