ART. 28 CHALCID FLIES NORTH OF MEXICO — BALDUF 79 



than each of F2 to F5, latter joints uniform in dimensions and 

 barely longer than wide, club as thick as funicular joints, tapering 

 to a blunt tip, and slightly longer than F4 and F5 combined; pro- 

 notum and mesonotum rather coarsely umbilicate, anterior-lateral 

 sclerite of mesopleura densely papillose, posterior area aciculate- 

 punctate, polished; propodeum coarsely reticulate, or rugose, groove 

 limited in front by a rounded carina, and with a polished depres- 

 sion in anterior portion; 12 or 13 setae on submarginal vein; abdo- 

 men polished, smooth, with only small parts granulose, area of ovi- 

 positor sheath densely and rather coarsely punctate, hairy. 



Male. — Length 2.2 to 2.5 mm., fairly slender, blacker than female; 

 head black, except oral area narrowly brown, scape sometimes duslcy ; 

 sides of pronotum yellow, the yellow area emarginate in front and 

 below, rest of thorax, the propodeum and peduncle, black, legs 

 lemon yellow except basal half to two-thirds of coxae black; abdo- 

 men brown-black above, shading to brown on the sides; funicular 

 joints not much longer than broad. In proportions of the head, 

 sculpture, and vestiture of the submarginal vein, the two sexes are 

 alike. 



Type.— Female, U.S.N.M. No. 42244. Alpine, Calif. (A. C. 

 Kinsey). 



The allotype is with the type in the collection of the United 

 States National Museum. 



Remarks. — Described from the type, allotype, and 12 male and 

 female paratypes reared by Dr. A. C. Kinsey in the type locality 

 from the galls of Plagiotrochiis quinqueseptum var. on Quercvs 

 engehnanni. The gall maker issued on February 24, 1920. 



All the males of this species at hand are predominantly black, 

 resembling closely the dark variety dorsalis of D. querci-lanae 

 (Fitch). The females are darker than those of querci-lanae^ but 

 do not reach the degree of blackness present in the male of either 

 of these two species. 



32. DECATOMA FOLIATAE Ashmead 



Decatoma foliatae Ashmead, Can. Ent., vol. 13, no. C, p. 136, June, 1881. 

 Decatoma batatoides Ashmead, Can. Ent., vol. 13, no. 6, p. 136, June, 1881. 

 Eudecatoma batatoides Ashmead, Trans. Amer. Ent. See, vol. 21, p. 319, 1894. 



(D. batatoides Ashmead designated type of new genus Eudecatoma 



Ashmead.) 



Differs from the light-colored querci-lanae (Fitch) in having ver- 

 tex and occiput continuously black, prescutum and scutel usually 

 entirely so, also propodeum and mesopleura black; the dark males 

 of foliatae are similar in degree and arrangement of black and yel- 

 low, to querci-lanae var. dorsalis (Fitch) ; these species are similar 



