478 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iis 



40. Eurytoma auriceps Walsh 



Map 19 



Eurytoma auriceps Walsh, 1870, p. 299. — Triggerson, 1914, pp. 1-34. — Viereck, 



1916, p. 522.— Peck, 1951, p. 575.— Bugbee, 1956, p. 503. 

 Eurytoma auricpes seminatrix Walsh, 1870, p. 299. 

 Eurytoma vagabunda Ashmead, 1881a, p. 134. 



Female: Black. Length averages 3.3 mm. (2.7-4.0). Abdomen 

 black to deep reddish brown; oval in lateral view; averaging 1.3 mm. 

 (1.0-2.0) in length; lateral compression medium; segment six dorsally 

 equal in length to segments four and five combined; sculpturing on 

 lower lateral surface of sixth heavy, but it plays out dorsally so that 

 upper half of lateral surface and dorsal surface are smooth and 

 shiny; white pUe covers dorsal and lateral one-half of segment eight; a 

 few scattered hau-s on dorsal and lower lateral aspect of seven; ninth 

 tergum short, broad and stubby; averaging .12 mm. (0.7-.22) in 

 length; ninth with exposed ends of ventral valves projecting upward 

 at less than a 45° angle m relation to horizontal axis of the abdomen. 

 Internal genitalia average 1.3 mm. (1.0-2.0) in length; 1.0 mm. 

 (.82-1.5) in height, height averages about 77% of the length; dorsal 

 and ventral valves anteriorly turn dorsally at approximately a right 

 angle; expanded plate of ventral valves may bend slightly posteriorly 

 so that stylet arch approaches a vertical plane; dorsal valves black for 

 horizontal length and narrow; black may or may not contmue onto 

 slightly wider dorsal extension of dorsal valves. Tegula yellow. 

 Propodeum shallowly concave; median furrow outlined by distinct 

 lateral carinae, clearly indicated in dorsal third or half only, extent of 

 median carina same or ventrally for about three-quarters of length of 

 furrow; lower area crossed by irregular horizontal ridges dividing sur- 

 face roughly into rectangles. Scape with outer face all yellow or upper 

 half black to dark brown; antenna filiform; segments of the flagellum 

 in the larger specimens longer than wide with the fifth only a little 

 shorter than the first; in smaller specimens, segments become pro- 

 gressively shorter distally, so that five may be almost square; six 

 closel}^ applied to seven and separated by a shallow annidation; seven 

 appears to consist of two closely fused units, about equal in length to 

 first segment. Lower half of face covered with striae that converge 

 upon the clypeus. Legs chrome yellow or brownish mfuscation on 

 hindfemora and tibiae; front coxae may be all yellow, or medial and 

 anterior faces yellow only; midcoxae also variable from yellow to black; 

 hindcoxae black. Wmg veins yellow to yellowish brown; marginal 

 vem stout and wider than postmarginal; marginal averages .30 mm. 

 (.22-.42) and the short, stubby postmargmal vein averages .16 mm. 



