NEW MALLOPHAGA. 54I 



angle with two spines and a hair; posterior angles rounded 

 and the nearly straight, slightly sinuous, posterior margin 

 with six weak hairs ; a weakly indicated, uncolored, trans- 

 verse, chitin bar about even with lateral angles ; no distinct 

 blotches. Meso- and metathorax fused, although the line of 

 fusion is marked by a lateral emargination and by an indi- 

 cated transverse suture ; posterior angles of metathorax with 

 two spines and a hair; the straight posterior margin with 

 a submarginal series of short and longer hairs interrupted 

 at the middle ; on the dorsal surface of the metasegment 

 six short spines arranged in two diagonal series of three 

 each. Legs long, slender, concolorous with thorax, 

 with fringes of short hairs along dorsal margins of 

 femora and tibice. Sternal markings weakly indicated 

 but of the type described as characteristic of Nitzschia, 

 consisting essentially of an open quadrilateral without 

 median blotches. 



Abdomen widening posteriorly to segment 6; segment 

 7 a little narrower than segment 6, and segments 8 and 9 

 narrowing more rapidly; all segments with two to three 

 spines in posterior angles and long hairs, increasing in 

 length and number on posterior segments, those on seg- 

 ments 6-9 being especially long, numerous, and hence 

 •conspicuous; segment 9 short, flatly convex behind, with 

 two very long hairs at each end of posterior margin and 

 a sparse .fringe of five uncolored hairs along the margin; 

 narrow, translucent, brownish, lateral bands, and the 

 whole abdomen dark, because crossed by broad transverse 

 bands, almost completely covering the surface: posterior 

 margin of each segment with a series of weak hairs. 



