NO. I3<ii. REVISION OF AMERICAN SIPIIONAPTERA—B. I KEIL 4( ) 1 



CERATOPHYLLUS LEUCOPUS, new species. 



There is a sing-le fenuilo in the collection, taken on ]*r<»injxcus 

 leucopus at Feterboro, New York, l)y Gcrrit S. Miller, jr., Avhich differs 

 widely from the species found on Peroiuyi^cus in the Southwest, 



Head stronoly rounded in from front to mouth, the frontal notch 

 distinct and accompanied l)y a small chitinous fold. Gena with two 

 oblitjue rows of bristles; of the h)wer three large bristles the middle 

 is smallest; tlie upper row contains a])out six small bristles of varying 

 sizes. A few small hairs occur just above the eye. Gena below the 

 eye very obtusely ang-led posteriorly. The antennal groove extends 

 to two-thirds the depth of the head; along its hind margin arc scat- 

 tered a number of small hairs, largest at the lower angle. The second 

 antennal joint is provided with a few l)ristles which are shorter than 

 the third joint. Disk of vertex back of middle of anteiuial groove 

 provided with one large and two small bristles. Hind margin of head 

 with the usual l)ristles, except that at the lower angle there are two 

 stout bristles, the lower of which is the smaller. The labial palpi 

 reach to about three-fourths the length of anterior coxfe. 



Pronotum with a transverse row of about twelve bristles on poste- 

 rior third and on hind margin a ctenidium of eighteen long, stout 

 spines. Meso and metanotum each with two rows of bristles, the 

 posterior with about ten long- ones, the anterior of more numerous 

 small ones. Metathoracic epiphysis with two large bristles behind, in 

 front of these four smaller ones, and still in front of these one bristle. 

 Metanotum and first four abdominal tergites each with a small tooth 

 on either side. 



Middle abdominal tergites with two rows of bristles, twelve to four- 

 teen larger bristles each on the posterior, fewer and smaller ones on 

 the anterior segments, Antep3'gidial spines three on each side, the 

 middle one in each group larg-est, the inner smallest. The middle 

 abdominal sternites each with a single row of about eight large l)ristles. 



Vestiture of end of abdomen not heavy. Beneath the pygidium on 

 either side are two long ])ristles. Style long' and slender, gradually 

 nan-owed to the tip, when; there is one long- bristle; on the lower mar- 

 gin also stands a l)ristle. Substylar flap obtuse, with two long sU^nder 

 bristles at extremity, the lower margin armed with four or ti\(> short, 

 stout bristles. 



Hind coxa; lacking miiuite teeth inside. Hind fenuir with one or 

 two small bristles on the side, proximally. Spines on apex of second 

 joint of hind tarsi all shorter than the third joint. First pair of spines 

 on last joint of hind tarsi strongly dislocated toward the median line 

 and pointing straight distad. Lengths of joints of hind tarsi in the 

 proportions 21-12-7. 5-5-8. 



Length, 2 mm. Color, pale brown. 



Ti/pe.— Cat. No. 6908, U.S.N.M. 



