May, 1908.] Descriptions of New Mallophaga. III. 
355 
to do. Thus the theory seems to explain and incorporate every 
observed fact and not to be out of harmony with the general 
conditions of the vicinity. 
Since drift of Wisconsin age lies in the smaller valleys and 
since the observed stream erosion, accomplished subsequent 
to the diversions, is so great, it is believed that the original 
diversion must have occurred in connection with some pre- 
Wisconsin ice invasion probably the earliest to come to this 
region. 
DESCRIPTIONS OF NEW MALLOPHAGA. III. 
E. P. Durrant. 
6. Menopon colaptis, nov. sp. Fig. 1, H. 
Description of female. Body, length 1.82 mm., width .74 
mm.; of pale golden-brown color, with darker and narrow trans¬ 
verse abdominal bands, many of the specimens, however, show¬ 
ing a reddish tinge. 
Head, length .27 mm., width .58 mm.; forehead broadly 
rounded with temples projecting; on front of head near lateral 
margins, arising from a clear space, two small, and one large 
hair; palps projecting a little more than terminal segment; a 
distinct ocular fringe; back of eye two small hairs, and on temple 
two long ones; occipital border concave with eight long hairs and 
with narrow brown marginal band; head of rather uniform color¬ 
ing, inner border of antennal pit dark; ventral surface with a pair 
of three-jointed backward-extending processes one-third the 
length of the head. 
Prothorax large, with thin smoky lateral extensions reaching 
as far as first long hair on occipital border; two long pustulated 
hairs on each lateral margin and eight on the posterior, the one 
at the anterior angle with a small spine on each side of it. Meta¬ 
thorax a little broader than the prothorax, with the posterior 
border slightly curved backward and with a number of hairs; 
legs of the general body color. 
Abdomen somewhat elongate, angles projecting slightly and 
bearing one long and two shorter hairs also one or two small 
spines; a row of hairs extending across near posterior margin of 
each segment; posterior border of last segment flattened and 
with a row of small hairs, a close fringe of fine hairs on ventral 
margin. 
Male. Body, length 1.54 mm., width .78 mm.; head, length 
.27 mm., width .59 mm. Except in size much the same general 
appearance as the female. 
