NEW MAL.L.GPHAGA. 107 



hairs, eighth segment with two hairs at each anterior and 

 posterior angle; ninth segment feebly angularly emar- 

 ginated with one short stiff hair on each side of the emar- 

 gination; lateral margins of abdomen transparent, con- 

 taining entering whitish appendages of clear chitin, and 

 on segments 2-7 a small distinct black blotch near the 

 anterior angle of each segment; seventh segment also 

 with a slightly curving, elongate, black Heck in the poste- 

 rior angle; eighth segment marked like the seventh ex- 

 cept that the posterior blotch is more narrowly linear; 

 segment 9 with a narrow marginal blotch on each side. 



Female generally similar to male; abdomen with one 

 hair on posterior angle of first segment, two hairs on 

 segments 2-4, three hairs on segments 5-7; segment 9 

 more acute than in male and two -pointed; segment 8 

 with linear blotch extending along whole length of mar- 

 gin; inside of lower end of this blotch and of marginal 

 blotch of ninth segment a curving, linear, brown blotch; 

 opening of vulva with nine stiff hairs on each margin. 



This member of the Nirmi nigroficti differs markedly 

 by the produced and narrowly rounded clypeus, the long 

 metathorax with acuminate posterior margin, and the en- 

 tire absence in both sexes of transverse blotches or lines 

 on the abdomen from such forms as -punctatus, sefliger, 

 and lineolatus, which in general appearance are somewhat 

 similar to this new form. 



Nirmus bcephilus n. sp. (Plate v, fig. 7.) 



A single female taken from a Killdeer Plover, AZgial- 

 itis vocifera (Lawrence, Kansas). Packard's outline 

 figure and incomplete description of Lipeurus gracilis, 

 host? (Amer. Nat., 1870, vol. iv, p. 95, pi. i, fig. 6) must 

 refer to a form resembling, in shape and markings, at 

 least, this species. The new species belongs to the group 

 obscit ro-sutiirati . 



