406 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxvii. 



above and round tipped, but suddenly and broadly dilated backward, 

 below. On the hind margin of this dilation are three stout, black 

 teeth, the two upper short, the lower of nearly same diameter, but 

 four times as long. The ventral style is long and slender, l)ut armed 

 onl}^ with a single short bristle. Eighth tergite laterally with a num- 

 ber of stout bristles, a row of four or five heavier ones in middle of 

 hind margin being especially noteworthy. 



Hind coxae without minute teeth inside. Hind femora with a row 

 of about four bristles along the side. Spines on apex of second joint 

 of hind tarsi shorter than third joint. Fifth tarsal joint with the first 

 pair of spines dislocated toward median line, though not strongly so. 

 Length of joints of hind tarsi in the proportions: 23-16.5-9-5-9. 



Length, 2.2 nmi. Color, pale brown. 



Type.— C2it. No. 6911, U.S.N.M. 



CERATOPHYLLUS ASIO, new species. 



From Prof. A. P. Morse comes a single female specimen taken at 

 Wellesley, Massachusetts, on Megascop>< a^io. There can be little doubt 

 that this occurrence is accidental and that the species is normall}' par- 

 asitic on some small rodent of that region. But so far this specimen 

 is the onl}" representative seen of a very distinct species. 



Head rather strongly rounded from occiput to the distinct apical 

 notch. Of the three stout bristles in the lower row in the gena the 

 first and second are nearly equal in size and smaller than that on lower 

 margin of head. The upper row of six small bristles extends from 

 lower margin of head to high on antennal groove. Gena below eye 

 rather acute posteriorly. Antennal groove extending to two-thirds 

 depth of head, strongly narrowed below, the hind margin with numer- 

 ous minute bristles especially near the lower angle. First antennal 

 joint with two transverse rows of minute hairs, second with about five 

 bristles which nearly equal the third joint. Back of the middle of 

 antennal groove occurs one large bristle, and back and above this are 

 about six smaller bristles; this arrangement alone clearly distinguish- 

 ing this species from others nearly related. The bristles on hind 

 margin of head are unusually strong. There are two at lateral angle, 

 the lower smaller. 



On the body all the bristles near the median dorsal line are unusually 

 long and stout. Pronotum with two transverse rows of bristles, the 

 one on posterior third of about twelve larger bristles, the anterior of 

 fewer and smaller ones. The hind margin of pronotum with a cteni- 

 dium of about twenty stout spines. The meso and metanotum each 

 have three rows of bristles, the posterior row of about twelve larger 

 bristles, the second row about the same number of small bristles, and 

 the third row with still fewer and smaller bristles. Metathoracic 

 epiphysis with two heavy bristles on hind margin, two smaller anterior 



