246 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 43. 



Or 



apical joints of the flagellum are so nearly consolidated as to appear 

 as one joint. Magnification of 50 diameters shows the dividing 

 suture. In the foUomng descriptions the flagellum is considered to 

 be the joints beyond the small ring-like joint. 



The notauli are obsolete, or nearly so, the mesoprescutum is there- 

 fore very poorly defined. 



ACORDULECERA DORSALIS Say. 



I have accepted DoctorMacGiUivray's determination of this species, 

 and on this basis the records of the larva having been bred from 



black oak and hickory are 

 ^^^Ss^jt^ii**.^::.^. --_ ^-s::=^u^^ ^ - i^ error, as will be seen by 



the references given to 

 some of the following 

 species. 



ACORDULECERA ANTENNATA, 

 new species. 



• Separated from the 

 other species of the genus 

 by having the two apical 

 joints of the flagellum 

 nearly consolidated, so as 

 to appear as one joint un- 

 der ordinary magnifica- 

 tion. The flagellum ap- 

 parently three jointed. 



Male. — Length 2.75 mm. 

 Labrum angulateapically; 

 middle fovea wanting; 

 frontal furrow present; 

 antennal furrows com- 

 plete to ocelli; ocellar ba- 

 sin obsolete; a shallow 

 depression at the side of each lateral ocellus; postocellar line much 

 longer than the ocellocular line; first ^oint of flagellum longer than 

 the second; hypopygidium truncate apically. Black; apex of cly- 

 peus, labrum, mandibles (except piceous apices), and legs yellowish- 

 white. Wings hyaline; venation pale brown. Face without dense 

 white pubescence. 



Newington, Fairfax County, Virginia. One male collected May 

 30, 1911, by S. A. Rohwer. 



Type.—Cat. No. 14416, U.S.N.M. 



The following species all have the flagellum distinctly four jointed: 



I. SCUTELLUM PALE. 



Fig. C— Antenna of Acorduloceea. a, antennata; b, 



BICLINIUS (EXCEPT THE SCAPE). 



