ART. 28 CHALCID FLIES NORTH OF MEXICO BALDUF 85 



genae siibreticulate, except cheeks along lower hind edge of eye 

 smooth, polished, malar space feebly strigose ; anterior lateral portion 

 of mesopleura shagreened, hind part aciculate punctate, anterior end 

 of propodeal groove limited by a V-shaped carina, sides of abdomen 

 entirely unsciilptured and highly polished, smooth. The body is 

 entirely black, only the front upper-lateral corners of pronotum are 

 brown yellow ; legs variable in color, front and middle coxae yellow 

 to entirely infuscate, hind coxae always black, femoral and tibial 

 disks of all legs more or less black, those of front pair feebly to those 

 of hind legs entirely so. The agreement of this series with the types 

 is so close that I am certain that these are the same species even in 

 the absence of host records for the latter lot. The dimensions of the 

 fimicular joints in this series of specimens confirms my descriptions 

 of these joints in the imperfect types. 



Six females and four males (Hopk. U. S. 15600^) were obtained on 

 April 22, 24, 25, and 29, 1918, from galls taken at Flagstaff, Ariz. 

 According to the data on the pins these came from galls on Rhodites 

 fusiformans Ashmead on Rosa sp. The rearing records accompany- 

 ing the specimens from these galls, however, do not coincide with the 

 data on the pins. Aside from the confusion in the records, it is quite 

 unlikely that a Decatonia known from an oak gall would also in- 

 habit galls on plants so far removed in relationship as the rose. I 

 have studied these specimens repeatedly with great care and am satis- 

 fied that they are Decaioma wiltzae. I find no characters that are at 

 variance with the essential features of the other specimens at hand. 

 It is probable that the host is a gall on oak. 



35. DECATOMA MARYLANDICA Girault 



Plate 2, Figure 25 

 Decatoma marylandica Girault, Bull. Brooklyn Ent. Soc, vol. 2, p. 112, 1916. 



Kesembles D. -fiorida Girault in being mostly black ; but -fiorida has 

 head twice as wide as long, only the anterior-lateral corners of the 

 pronotum yellow^, and legs yellow except coxae, which are black; in 

 D. 7)w,rylandica the head is about three-fifths as long as wide, lateral 

 surfaces of pronotum yellow full length, but narrowly on posterior 

 half, and at least the hind femora and tibiae black. 



Female. — Length 2.5 to 3 mm., fairly robust, color mostly black; 

 head black, with fine ocular ring of yellow-brown, labium and palpi 

 yellowish white ; scape and pedicel lemon yellow, but basal two-thirds 

 of latter brown above, Fl to F3 dusky, F4, F5, and club light chest- 

 nut brown; pronotum black, anterior-lateral half broadly and pos- 

 terior half narrowly yellow, lower edge of notum black; rest of 

 thorax and propodeum black, tegulae brown ; front and middle legs 

 lemon yellow, except base of coxae and outer femoral disks, which 



