190 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



at middle, which is free and projecting over the third segment; third 

 segment vaguely projected over the fourth at middle; vertical por- 

 tions of the segments not conspicuously pubescent; pygidium with- 

 out a projecting carina. Prosternum sparsely, finely punctate, and 

 sparsely clothed with moderately long, semierect, whitish hairs; pro- 

 sternal lobe broad, moderately declivous, and broadly but not deeply, 

 arcuately emarginate in front, forming a rounded lobe on each side 

 of the emargination ; prosternal process rather narrow, the sides 

 parallel to behind the coxal cavities, then obliquely narrowed to 

 the apex, which is rather acute. Tibiae slender, and without a distinct 

 tooth on inner margin at apex. Posterior tarsi nearly as long as 

 the tibiae, and the first joint nearly as long as the following three 

 joints united. Tarsal claws similar on all feet, cleft near the base, 

 the inner tooth broad and very short, and not turned inward. 

 Genitalia not examined. 



Length, 3.75 mm. ; width, 1 mm. 



Redescribed from the lectotype, No. 3487, in the Academy of Nat- 

 ural Sciences in Philadelphia. 



Type locality. — New Mexico (no definite locality). 



Variations. — No variation was observed in the two specimens 

 examined, except that the paratype which is from the type locality 

 is 4.25 millimeters in length. 



Host. — Unknown. 



The two examples, which are without doubt the same sex, are prob- 

 ably females, unless the peculiar abdominal lobe is a sexual character, 

 in which case they would be males. In general appearance the 

 species resembles Taphrocenw agriloides, and the disk of the prono- 

 tum is more or less sculptured as in some of the A?ithaxia, but it can 

 be separated from all other known North American species of this 

 genus by the posterior margin of the second ventral segment of the 

 abdomen being free and slightly projecting over the next segment. 

 The four specimens in the Horn collection under this species, and 

 labeled " Tex.," are not ventralis. 



63. AGRILUS OBOLINUS LeConte 



Figure 44 



Agrilus obolinus LeConte, Trans. Amer. Philos. Soc, vol. 11, new ser., 1859, 

 p. 248.— Horn, Trans. Amer. Ent. Soc, vol. 18, 1891. pp. 313-314 

 (part).— Fall, Calif. Acad. Sci., Occasional Papers, No. 8, 1901, p. 120 

 (probably coftti pom-is) . — Woodworth, Guide to California Insects, 

 1913, p. 195 (probably costipemvis). — Chamberlin, Cat. Buprestidae. 

 1926, p. 72 (part). 



Agrilus knuusi Schaeffer, Bull. Brooklyn Inst. Mus., vol. 1, no. 15, 1909, 

 pp. 376-377.— Fall, Trans. Amer. Ent. Soc, vol. 36, 1910, pp. 138-139. 



