114 PROCEEDINGS OF THE NATIONAL, MUSEUM vol.68 



EUCEROPTRES PRIMUS Ashmead 



The followincr notes on the types are made to supplement the 

 original description. 



Seen from above the body has a wed<^e shape, narrowing gradually 

 from the head which is the broadest part of the body. Head broad- 

 est behind the eyes. Lengths of segments of female antenna as 

 (scape) 9 (width 4) :5(3) : 9(2.5) : 8: 7 : 7: 6.5 : 6: 5.5 : 5 : 5 : 5 : 9(4.5). 

 In the male the third is to fourth as 12 : 10 and the third is 

 strongly excavated. The pronotum is not "narrow" in the middle as 

 in the gallmakers but relatively long as in all the genera of guest 

 flies, broadly truncate, the trucation not margined, however, either 

 above or on sides. Mesoscutum broader than long, coriaceous rather 

 than rugulose with scarcely a suggestion of transverse sculi:)ture, 

 median groove short, about twice as long as broad. Carinae of pro- 

 podeum curved slightly outward. liadial cell closed, two and one- 

 fourth times as long as broad, first abscissa of radius arcuate. Areo- 

 let reaching about one-fifth way to basal, its distal vein showing a 

 break, cubitus directed tow^ard lower quarter of basal. Middle and 

 hind coxae each with a bare and polished area, tarsal claws with 

 tooth. Ab/iomen of female in side view showing length to height as 

 58:40, the hind margins of tergites II and III being parallel and 

 oblique, making an angle of about 45° with the longitudinal axis of 

 abdomen, the third showing a much larger area in side view; lengths 

 of tergites along dorsal curvature as (petiole) 2:34:20:6, rest not 

 visible dorsally, tips of ventral valves projecting slightly behind, 

 petiole smooth, second, and third bare and highly polished with a 

 dorsal patch of fine punctures on third, scattered punctures on 

 fourth, hypopygium punctured and pubescent, ventral spine very 

 short. In male lengths of tergites along dorsal curvature as (peti- 

 ole) 3:33:17:3:0:0:11, third faintly punctate, last plainly so 

 and pubescent, hind margins of two and throe parallel and obli(|ue 

 as in female. 



Biology. — The types were reared March 24 and April 7 from a 

 gall on leaves of scrub oak at Georgiana, Florida. Two paratypes 

 which are smaller and brownish but similar in structure are from a 

 gall on Q. alba from Massachusetts. A male and female of wdiat 

 the writer determines as this species were found among the un- 

 mounted cotype material of (Jynips cicatricula Bassett, now regarded 

 as a synonym of Andrlcus fetiolicola (Bassett). These were from 

 Q. alba at Waterbury, Conn. The writer has bred specimens from 

 the oak petiole gall on Q. steUatn as Rossh'n, Virginia, July 1, 1923. 

 The National Museum has one captured at Washington July 5, and 

 the writer captured one at Ocala, Florida, on April 17, 1914. 



