AUT. 28 CHALCID FLIES NORTH OF MEXICO BALDUF 5 



Head usually from two-thirds as broad as long to twice as broad 

 as long, oval to subrectangular in outline above, moderately to 

 slightly convex in front, eyes and malar space nearly equal in length, 

 surfaces reticulate, each reticulation with a small hair-bearing um- 

 bilicate puncture, except sometimes cheeks and malar space more or 

 less smooth and shiny, and occasionally cheeks strigose, and usually 

 vertex finely and densely punctate, malar groove broad and well de- 

 fined usually only on basal half (nearest to eyes) ; punctate areas of 

 head moderately and inconspicuously hairy, ocelli forming a low 

 triangle, median ocellus very close to upper edge of antennal scrobe ; 

 scape of antennae about three times as long as pedicel, and more 

 or less thickened on basal half, pedicel always longer by about one- 

 third than Fl, narrow at base and expanding quicklj^ from basal 

 fourth, scape usually reaching about to middle of F3. one ring-joint, 

 five funicular joints constant, F2 to F6 varying in dimensions, some- 

 times much longer than thick, but mostly not much longer than their 

 greatest diameter, and at times slightly broader than long; club 

 3-jointed, compact, usually not so long as F3 to F5 combined and 

 slightly broader than the rest of the antenna, widest at second joint, 

 the third small and conical with blunt tip; flagellum moderately 

 clothed with rather short inconspicuous whitish hairs: joints of 

 funicle and club with elongate shallow hair-bearing, and also dot- 

 like, sensoria, quite uniform in number and arrangement. (PL 3, 

 figs. 30, 31.) 



Pronotum and sclerites of mesothorax above hairy like the face, 

 and umbilicately punctate, becoming smoother at the lower edges 

 where femora fold against the body; prescutum, scapulae, axillae, 

 and scutel definitely distinguished by well-developed sutures and 

 moderately rounded above (pi. 3, fig. 29), mesopleura with lateral 

 area below tegulae and anterior to metapleural cluster of silvery 

 hairs, bare, shagreened, and aciculate-punctate ; metapleura punctate 

 and always clothed with a broad, rather dense covering of long sil- 

 very hairs; pronotum subrectangular, transverse, front and hind 

 margins almost parallel (pi. 3, fig. 27), sides slightly converging 

 toward rear, about twice as broad as long and transversely arched, 

 length about equal to that of prescutum, usually slightly more nar- 

 row than maximum width of mesothorax. latter broadest across 

 tegulae; front legs shortest, but their coxae intermediate in breadth 

 and length between length of meso- and metacoxae, first and second 

 tarsal segments almost equal in length, third and fourth shorter and 

 nearly same length, last segment longest, bearing a pair of simple 

 claws, strigilis with a row of fine short stiff hairs on first tarsal 

 joint, curved tibial spur reaching to about middle of this segment; 

 midlegs most slender, tibiae with a strong apical spur, first and last 



