( 653 ) 



third ventral ones are sometimes absent. The last three stand at the apical margin, 

 the nppermost being the longest. 



AMomeu. — The first abdominal tergite bears two rows of bristles, with some 

 additional ones on the back. All the other tergites bear only one row, except the 

 second, where a few hairs indicate the anterior row. On the middle segments the 

 row consists of five bristles, one standing beneath the stigma. On tergite 1 there 

 are two or three short apii^al spines on each side, on tergite 2 two, and on the 

 3rd tergite one. On the seventh tergite there is one long bristle accompanied on 

 each side by a minnte hair. The basal sternite bears one ventral bristle on each 

 side, the second one or two, the three following three, and that of the seventh 

 segment five to eight. 



Legs. — The bristles on the mid- and hindcoxae are very few in nnmber, there 

 being about four or five on the onter surface, besides those standing at the anterior 

 and apical edges. The mid- and hindfemora bear a pair of bristles in front of the 

 basal ventral sinns, and another pair behind it. There are no bristles on the outer 

 surface except two or three subapical ones, of which one or two are ventral and 

 one lateral. The mid- and hindtibiae bear on the innerside three or four short hairs, 

 and on the outerside one regular row of bristles. At the dorsal edge of the 

 hindtibia five bristles are prolonged, the first, third, and fifth being much longer 

 than the second and fourth. The first hindtarsal segment bears seven or eight 

 pairs of bristles on one side and six on the other. The fourth segment of the 

 hindtarsns is triangular, being about half as long again as broad. 



Modified Segments. — The eighth tergite bears two long bristles below the 

 stigma, with or without a shorter one in front, seven along the apical edge, of 

 which two or three are short and stout, and five or six between the apex and 

 middle. 



Length : ? , 2'5 mm. 



We have two ? ? of this species from Cowicham Demeans, British Columbia, 

 August 4th, 19U3, from " Brown Bat," collected by Mr. Allan Brooks. 



This species somewhat resembles Ceratopsi/Ua martialis, described in Nov. 

 Zool. X. p. 322 (1903), from Reunion, but differs in being much less hairy. The 

 only other Oeratopsi/lin known from North America is Ceratopsi/lla insignis, I.e. 

 p. 319, an entirely different species. 



