482 TERTIARY INSECTS OF NORTH AMERICA. 



The measurements of the best specimen are : Length of head and 

 rostrum, 1.35 mm ; of thorax, 0.9 mm ; of elytra, 2.6 mm ; breadth of thorax, l mm . 



Green River, Wyoming. Three specimens, Nos. 15234 (F. C. A. 

 Richardson), 101 (Prof. L. A. Lee), 76 (Dr. A. S. Packard), 



EUGNAMPTUS DECEMSATUS. 



PL 8, Fig. 12. 

 Etignamptus dtcaiisalus Scudd., Bull. U. S. Geol. Geogr. Surv. Terr., IV, 764-765 (1878). 



A single elytron with a broken base is all that remains of this species. 

 But this is peculiar on account of the supplementary humeral stria, which 

 seems to be common in the Rhynchitidse, and at least very rare in the 

 allogastral Rhyncophora, to which one would at first glance refer this 

 fragment. So far as the material at hand permits determination it appears 

 to agree best with the genus to which it is referred, on account of the dis- 

 position of the punctuation and the form of the tip of the elytron. It repre- 

 sents, however, a very large species, and one whose punctuation is very 

 .delicate. The elytron is long and rather narrow, indicating an elongated 

 form for the body, as in this genus, with parallel sides and a bluntly rounded 

 tip. There are ten complete equidistant rows of delicate, lightly impressed 

 punctures, those of the same row less distant than the width of the inter- 

 spaces ; the outer row lies close to the outer border and is seated in an 

 impressed stria, as also is the apical half of the inner row ; but the other 

 rows show no such connections between the punctures which compose 

 them ; at the base the rows curve very slightly outward to make place for 

 a very short humeral row of punctures, parallel to the inner complete row, 

 and composed of only three or four punctures on the part preserved ; the 

 interspaces are smooth. 



Length of fragment, 4.5 mm ; width of elytron, 1.5 mm . 



Green River, Wyoming. One specimen, No. 4046. 



Family RHIPIPHORID^ Gerstaeeker. 



RHIPIPHORUS Fabricius. 

 RHIPIPHOKUS GEIKIEI. 



PI. 27, Fig. 1. 



A single specimen preserved upon a side view seems clearly referable to 

 Rhipiphorus except for the well rounded tip of the elytra. The thx-ee lines 



