418 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxvii. 



minute 1)ristles in the position of the second row. The end of the 

 al)dt)nien is provided with comparatively ver}^ few bristles. Beneath 

 the p3"gidium on either side occurs one \o\\g and one short bristle. 



The stvle is very l)road at base and rapidly narrowed to the apex, 

 where there is a single bristle, proximad of which on the lower margin 

 stands a smaller bristle. Substylar flaj) rather long, obtusely pointed, 

 with two long bristles near the tip and about four short, stout l)ristles 

 on the lower margin. Lateral portion of eighth segment near hind 

 margin with scattering small bristles. 



Hind coxfB without minute teeth inside. Hind femur with one small 

 bristle on the side dorsally. First joint of hind tarsi with live groups 

 of spines on the anterior border and six on the posterior. Apical 

 spines on second joint of hind tarsi not exceeding the third joint. 

 First pair of spines on tifth tarsal joint slightly dislocated toward 

 median line and directed straight distad. Lengths of hind tarsal joints 

 in the proportions 28-11-6.5-5-10. 



Length, 2.75 mm. Color, pale ))rown. 



Type.—Ciit. No. 6920, U.S.N.M. 



CERATOPHYLLUS STYLOSUS, new species. 

 Plate XIV, figs. 1-7, and Plate XV, figs. 1-2. 



This species is the largest of the order in America, and of most 

 anomalous structure. It was collected at Astoria, Oregon, on Aplo- 

 dontia rufa, by Dr. A. K, Fisher, of the U. S. Biological Survey. 

 There is no doubt but that in the still further division of this genus 

 which must come this will form a separate genus by itself. Viewed 

 in the broad sense in which these genera are here treated, it ma}" be 

 placed in Ceratojphyllus temporarily^, though in most of its characters 

 it is absolutely unique and stands alone. It has some affinities with 

 IlystrichopsyUa. 



Female: Head evenly, rather strongly rounded from the occiput to 

 the deepl}^ cut frontal notch. Save for a slight thickening in the 

 chitin at the edge of the autennal groove, the eye is totalh^ wanting. 

 The lower row of genal bristles consists of five stout bristles distrib- 

 uted between the margin of the antennal groove and the lower margin 

 of the head. Above this the second oblique row consists of about six 

 much smaller bristles. The lower margin of gena is strong!}^ sinuate, 

 and the posterior prolongation is narrowly rounded or very obtusely 

 pointed. The antennal groove extends to two-thirds the depth of the 

 head, the anterior margin greatly thickened, the posterior margin not 

 sharply defined and covered by a large number of minute hairs. The 

 first antennal joint has three transverse rows of short bristles on 

 outside; the second joint bears about ten bristles which do not extend 

 to half the length of the third. The disk of the vertex back of the 

 middle of the antennal groove with an oblique row of bristles, con- 

 sisting of one large bristle near the antennal groove and about six 



