216 PROCEEDI?fGS OP THE NATIONAL MUSEUM. vol.43. 



LAGIUM ATK£>VIOLACEUM (Norton). 



AllantiLS atroviolaceus ^onTOi^ , Boston Journ. Nat. Hist., vcfl. 7, pt. 2, 1860, p. 36, 



male and female. 

 Tenthredo atroviolacea Norton, Trans. Amer. Ent. Soc, vol. 2, 1869, p. 239; Norton 



Catalogue, p. 171. • 



Norton's type of this species seems to be lost, as it is not in Phila- 

 delphia; however, it may be in the Peabody Museum. What has 

 been restricted as this species was determined atroviolaceus by Cresson, 

 and is represented in the collection only by specimens from New 

 Jersey. 



LAGniM PLANIFRONS, new species. 



In the female this species is very close to atroviolaceum, but in the 

 male it is easily separated. The foregoing table will aid in its deter- 

 mination. 



Female. — Length 14 mm. Labrum obtusely pointed; emargination 

 ^of the clypeus distinctly broader than the lobes; supraclypeal foveae 

 not connected with antennal foveae; middle fovea obsolete; antennal 

 furrows broad, shallow and nearly continuous; postocellar furrow 

 wanting; postocellar area about tmce as wide as long; occiput cari- 

 nate in middle; area between ocelli and orbits sparsely punctured; 

 pedicellum with the length and width subequal; third antennal joint 

 much longer than fourth; stigma rounded below, apically subtruncate; 

 metanotum strongly punctured; sheath obUque below; nates not pro- 

 duced below; apical joint of hind tarsi subequal "s\'ith the two preced- 

 ing. Black; anterior tibias and tarsi pale brown beneath; hind coxae 

 with a pale spot; wings black. 



Male. — Length 10 mm. Agrees with the above description of 

 female, except the posterior coxas are black. Hypopygidium broadly 

 rounded. 



Virginia; East Falls Church, May 13, 1911; Pohick Run, June 4, 

 1911; Newington, May 3, 1911, and June 4, 1911. Above collected 

 by S. A. Rohwer. Also one female from Dixie Landing. 



Type.—Csit. No. 14253, U.S.N.M. 



ZALAGIUM, new genus. 



Intermediate between Lagium Konow and Macrojphya Dahlbom, 

 but superficially more hke Lagium. In synoptic tables with the width 

 of facial quadrangle as the primary character, Zalagium will fall near 

 Macropliya from which it will be separated by the long antennae, 

 which are flattened and constricted at the joints; the occiput not being 

 carinated; and the normal hind coxaB. Zalagium may be separated 

 from Lagium by the f ollo\\dng characters : Eyes closer together at the 

 clypeus than the length of the eye ; shorter malar space ; long clypeus 

 and labrum; different punctuation and aulation of head; and the 



