ART. 28 CHALCID FLIES NORTH OF MEXICO BALDUF 3 



EXPLANATION OF TERMS 



Dimensions of the head. — Measured by aid of an ocular microm- 

 eter. Both width and length measurements were taken from the 

 dorsal view at an angle and a position that gave the maximum 

 dimensions. 



Cubital row. — A rather well-defined line of hairs not different in 

 size from other hairs on the apical third of the front wing. It is 

 best visible at an acute angle, and extends lengthwise across the 

 outer third about midway between the front and hind margins of the 

 wing. It is designated '' cubital " because it seems to have the posi- 

 tion of that vein as figured by Snodgrass (Proc. U. S. Nat. Mus., 

 vol. 39, pi. 16, fig. 77, 1910) . (PI. 3, fig. 33, /.) 



^ubdiscoidal row. — A line of hairs similar to but somewhat more 

 readily discovered than the cubital row, and located caudad of it 

 and extending in general parallel with the hind margin of the wing. 

 In species having a full}'' developed color band, the subdiscoidal 

 row passes near the apex of this band. (PI. 3, fig. 33, g.) 



Secondare/ hand. — In some species there occurs a second, but usu- 

 ally more faint and always smaller and irregular, band of color 

 across the wing proximad of the main or submarginal band and 

 coextensive with it. (PI. 1, figs. 2 and 5.) 



Funicular joints. — Frequent reference is made in the descriptions 

 to the several joints of the antennae. For convenience each joint 

 of the funicle is designated by a letter-figure combination, F for 

 funicular joint, and the following figure referring to the particular 

 joint under consideration. For example, F4 designates the fourth 

 funicular joint, counting from the base of the funicle. The female 

 Decatomini possesses five such joints, whereas the male has only 

 four. (PI. 3, figs. 30 to 32 ; pi. 4, figs. 41, 42.) 



Tribe DECATOMINI: Family EURYTOMIDAE 



The Eurytomidae are easily distinguished from the other families 

 of Chalcidoidea, except the Callimomidae, by the form of the pro- 

 notum, and from the latter family by the shorter ovipositor and the 

 form of the antennae and the abdomen. The front and hind mar- 

 gins of the pronotum are nearly parallel, and the sides slightly con- 

 vergent posteriorly, or the sclerite as a whole is subquadrate, usually 

 about twice as wide as long. (PI. 3, fig. 27.) In the female Eury- 

 tomidae the abdomen is moderately to strongly compressed, but in 

 the males this region is subcylindrical. somewhat as in the Calli- 

 momidae. The latter group possesses a relatively undifferentiated 

 flagellum, which, in the Eurytomidae, consists of a distinct funicle 

 and more or less developed club. Moreover, the colors of most Eury- 

 tomidae are dull, but the Callimomidae have a metallic surface. 



