5*8 
The Ohio Naturalist. 
[Vol. VI, No. 7, 
DESCRIPTIONS OF NEW MALLOPHAGA. 
E. P. Durraxt. 
1. Physostomum serraHmi sp. nov. (Fig. 1, B.) 
Female — Length, 4.7 mm., width, l.;i 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, .8fi 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 
.48 mm., width, .4(1 mm. 
Abdomen with sides slightly swelling at middle, last segment broadly 
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, e.xcept 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 
Osborn’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 fulvous, 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 
rounded, margins diverging, slightly undulating, ocular notch small 
with two small hairs, fleck large; temple extended posteriorly, angle 
slightly out-turned, one short and two long bristles; occipital margin re- 
entering, 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 
occipital band, light brown; palpi scarcely e.xtending to margin of head. 
Thorax, length, .83 mm., width, .65 mm.; jirothorax broader than 
long, narrower than head, lateral margins evenh’ rounded except at an- 
terior part which is slightly incurved and has two small hairs and a bristle; 
long bristle at rounded posterior angle; anterior and posterior margins 
slightly concave; dark brown bands along lateral sub-margins; marginal 
extensions clear and of even width. 
Metathorax longer and wider than ])rothorax, 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 
