•220 Journal New York. Entumolouical Society. [Voi x. 



brown blotch on each side ; a transverse row of short hairs along the middle of the 

 segments, not reaching the lateral margins. 



The markings of the male are identical with those of the female but there is a 

 marked difference in size, the male being much the smaller. 



Measurements of the male : body, length 1. 77 mm., width .65 mm.; head, length 

 .48 mm., width .47 mm. 



Numerous specimens of both male and female were collected from 

 the American Magpie (P/ca pica hiidsonica), at Ft. Robinson, Neb., 

 Dec. 14, 1895, by W. D. Hunter. 



These specimens are close to the species as described by Piaget from 

 Pica leiicoptera, and on account of the striking coloration might at first 

 glance be taken for the original species. However they differ in size, 

 in the width and intensity of the abdominal markings and the mark- 

 ings of the temples. The female was not seen by Piaget. 



Nirmus infrequens, sp. nov. (Plate XX, Fig. 3.) 



Fc'iiiau-. — Length 1.45 mm., width .4 mm.; head elongate cordate with the 

 peculiar V-shaped ocular bands common to these forms ; thorax with lateral, marginal 

 bands and metathorax with internal bands ; abdomen with widely broken lateral 

 bands and heavy median transverse bands ; whole body clear except the head, which 

 is pale brownish. 



Head, length .46 mm., width .29 mm.; front broadly parabolic, one hair 

 a .short distance in front of the trabecula;, which are very minute and colorless ; eye 

 slightly convex, with a very small bristle at the posterior angle ; temples with one 

 long hair and a short bristle ; occiput slightly concave, naked, with a narrow dark 

 border ; no clypeal signature, but a clear oral fossa, expanding laterally as it ap- 

 jiroaches the mandibles ; whole head narrowly bordered with blackish-brown, shad- 

 ing inwardly ; antennal bands bending inward at trabeculae for nearly one third the 

 width of the head, then straight back to the margin at the eye, where it meets the 

 heavy temporal band ; a light brown shield-shaped occipital signature ; antennae with 

 the first two segments longest and the whole uniformly brown. 



Prothorax small, angles rounded; heavily bordered laterally with blackish- 

 brown, the bands extending around on the posterior border, narrowing and nearly 

 meeting on the median ]iortion ; a large clear pustule without hair in the posterior 

 angles and a short weak hair. The coxal lines show through very distinctly. 

 Metathorax aliout the same length as the prothorax but much broader ; sides rounded 

 and widely diverging ; posterior border rounded, with si.x long hairs on each side ; a 

 dark spot in the anterior angles and a heavy irregular blotch extending inward from 

 the posterior angles, narrowing and nearly meeting in the middle of the segment. 



Abdomen subclavate, sides of posterior half nearly parallel and tapering abruptly 

 at the eighth segment ; the posterior angles projecting, nearly colorless and with one 

 rather long and one short hair ; eighth segment with hairs along the lateral and pos- 

 terior margins ; ninth segment naked ; segments one to eight with a dark black- 

 ish-brown patch in tlie anterior half of the lateral margins and projecting anteriorly into 

 the adjacent segment; internal clear portion obscured by heavy, median, transverse 



