98 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



both specimens having the coarse, widely separated punctures on the 

 head, but since no constant characters have been found for separating 

 these females, and juglandis has been described from reared mate- 

 rial of both sexes, it seems advisable to retain both names for the 

 present. In case constant characters are found in the future for 

 separating the females of the otiosus group, and these two species 

 should prove to be the same, puncticeps will have precedence over 

 juglandis. 



It is difficult to see how Horn (1891) could have placed puncticeps 

 as a synonym of egenus Gory, since the two species belong to dif- 

 ferent groups of the genus, egenus having the antennae serrate from 

 the fifth joint, and puncticeps serrate from the fourth joint. Cham- 

 berlin (1926) gives the host as black locust, but this is the host plant 

 of egenus, of which the above species has been erroneously placed as 

 a synonym. 



Host. — Unknown. 



29. AGRILUS MACER LcConte 

 Figure 22 



Agrilus macer LeConte, Proc. Acad. Nat. Sci. Phila., vol. 10, 1858, p. 70; 

 Journ. Acad. Nat. Sci. Phila., ser. 2, vol. 4, 1858, p. 35; Trans. xViner. 

 Philos. Soc, new ser., vol. 11, 1859, p. 248. — Horn, Trans. Amer. 

 Ent. Soc, vol. 18, 1891, pp. 298-299, pi. 8, fig. 9.— Hamilton, Ent. News, 

 vol. 7, 1896, p. 292; Canad. Ent., vol. 28, 1898, p. 263.— Chittenden, 

 U. S. Dept. Agric, Div. Ent., Bull. 22, new ser., 1900, p. 68 — 

 Schaeffer, Brooklyn Inst. Mus., Sci. Bull. vol. 1, no. 6, 1905, p. 131. — 

 Frost and Weiss, Canad. Ent., vol. 52, 1920, p. 207. — Chamberlin, 

 Cat. Buprestidae, 1926, p. 69. 



Male. — Strongly elongate, distinctly flattened and strongly shin- 

 ing ; head aeneous, greenish toward the sides, and becoming brownish 

 cupreous on occiput ; pronotum and elytra uniformly brownish cupre- 

 ous; beneath brownish cupreous, slightly more shining than above, 

 and the legs greenish. 



Head with the front rather narrow, slightly, irregularly concave, 

 about equal in width at bottom and top, lateral margins arcuately 

 expanded at middle, and with a distinct, longitudinal groove on the 

 occiput; surface uneven, coarsely, rather densely punctate, somewhat 

 rugose, and sparsely clothed with long, recumbent whitish hairs; 

 epistoma strongly transverse between the antennae, and very broadly, 

 deeply, arcuately emarginate in front; antennae extending to middle 

 of pronotum, serrate from the fourth joint, and the outer joints as 

 wide as long; eyes large, elongate, and about equally rounded above 

 and beneath. 



Pronotum nearly one-half wider than long, wider at apex than 

 at base,' and widest near apical angles; sides obliquely narrowed 



