528 The Ohio Naturalist. [Vol. VI, No. 7, 



DESCRIPTIONS OF NEW MALLOPHAGA. 



E. P. DURRANT. 



1. Physostomum serratum sp. nov. (Fig. 1, B.) 



Female — Length, 4.7 mm., width, 1.3 mm.; wide marginal bands on 

 abdomen with sinuous, dark central line in bands sharply reflexed at pos- 

 terior part of each segment. Among the largest of the genus. 



Head .88 mm. long. .86 mm. wide, evenly rounded at front, which is 

 half as wide as occiput, lateral margins slightly convex, posterior angles 

 incurved, occipital border broadly concave. Palettes rather large, palps 

 extending slightly beyond margin of head, anterior sub-margin convex 

 with a number of hairs. Antennal fossae with broad inner border; 

 ocular notch slight, fleck conspicuous. There are three hairs on lateral 

 border of head, one half way between fleck and angle, one near point of 

 angle, and one as far in front of eye as eye is from angle. 



Prothorax much broader than long, greatest width equal to that of 

 head; posterior border convex, lateral margins rounded, with large bristle; 

 marginal extensions narrow and of uniform width ; metathorax much 

 longer than prothorax; anterior rounded and slightly swelling, lateral 

 border diverging posteriorly, large bristle at angle. Length of thorax 

 .43 mm., width, .46 mm. 



Abdomen with sides slightly swelling at middle, last segment broadh' 

 rounded with posterior part expanded; marginal bands broad, with dark- 

 brown line in middle sharply reflexed toward median line at posterior 

 part of each segment except seventh. This whole line, which is charac- 

 teristic of the genus, has a serrate outline and seems to distinguish the 

 species. The color of legs and head is tawny, except the darker inner bor- 

 der of antennal fossae and small blotches further forward, the abdomen 

 and thorax each a shade darker. 



Described from a single specimen in Professor Herbert 

 Osbom's collection, taken from Desert Homed Lark (Otocoris 

 sp.) at Ft. Collins, Colo,, by J. H. Cowen. 



2. Physostomum sub-hastatum sp. nov. (Fig. 1, A.) 



Female — Length, 3.17 mm., width, .98 mm.; light fulvovis, abdomen 

 with dark bands near lateral borders, head and thorax with numerous 

 markings of dark brown, legs same color as body. 



Head, length .73 mm., width, .60 mm.; front broad and evenly 

 nninded, margins diverging, slightly undulating, ocular notch sniall 

 with two small hairs, fleck large; temple extended posteriorly, angle 

 slightly out-turned, one short and two long bristles; occipital margin re- 

 en-lering, occiput convex; labral lobes prominent, brownish incurved 

 blotch back of lobes; antennal fossae well-marked, interior border with 

 dark-brown band ; two curved brown blotches between antennal fossae and 

 those curving in from margin back of palettes; narrow sub-marginal 

 ()cci])ital band, light brown; palpi scarcely extending to margin of head. 



Thorax, length, .83 mm., width, .65 mm.; prothorax broader than 

 long, narrower than head, lateral margins evenly rounded except at an- 

 terior part which is slightly incurved and has two small hairs and a bristle; 

 long bristle at rounded ]i()steri()r angle; anterior and posterior margins 

 slightly concave; dark brown liands along lateral su1i-margins; marginal 

 extensions clear and of even width. 



Metathorax longer and wider than prothorax, anterior part covered 

 by it; margins diverging, large swelling near anterior ])art with three 

 small hairs; large bristle and two small hairs at posterior angle; same 



