304 
Xeiv Mallophaga 
Genus Heteroproctus, nov. 
Akidoproctidae of more than average size (3-4 mm.), and elongate 
form. Head with deep scj^uarish emargination in front; trabecular 
angle rounded, and with a ridge running parallel to its lateral border 
dorsally, giving a double outhne; antenna of d with an appendage on 
the third segment. Prothorax with prominent stigmata at postero¬ 
lateral angles; metathorax wider than the head, widest posteriorly. 
Abdomen of nine segments, the eighth of which is obviously of a double 
nature; parallel-sided, tapering rapidly from the seventh segment to 
an acuminate point in the ?, but only gradually in the d to the much 
wider bilobed ninth segment; bands differing in the sexes, d genitalia 
with large parameres with bluntly rounded apices, the remainder of the 
apparatus being plate-like. 
Heteroproctus hilli, n. sp. Figs. 8-11. 
lieference to the figures of d and $ will make clear the general form. 
The d is smaller than the 9, and the sexes differ in the form of the 
antennae, of the posterior end of the abdomen, and of the abdominal 
markings. The two latter differences affect the chaetotaxy. 
The head is narrow in front, where it ends in two rounded forcipate 
lobes, separated by the emargination, which is Avider posteriorly, and 
extends about half way to a line joining the antennae; the lateral 
margins of the forehead concave, Avidening to the trabecular angle, Avhich 
is bluntly rounded, and has the double character alluded to above; 
behind this angle the head is distinctly constricted; the eye is not 
prominent, the pigment fleck being small and roughly triangular; from 
the eye the temples swell out evenly, the greatest AA’idth being a little 
in front of half the distance from eyes to occiput; Asddth at temporal 
angles about that at eyes, angles rounded; occiput sinuous, AAuth a 
median and tAvo lateral concavities, separated by tAvo shght convexities. 
Antenna of S large, first article as long as second and third together, 
cylindrical, narroAver proximally; second article two-thirds first, 
narrower; third article shorter, truncated, Avith an appendage; foixrth 
and fifth sub-equal, cbverging almost at right angles; the terminal 
three articles distinctly darker than the basal tAvo. Antenna of $ Avith 
first article shorter, thicker, and lighter in colour than second; terminal 
three forming a decreasing series, all darker in colour than second; final 
tAvo forming an angle with remainder. Sensory grooves elongate, one 
on each of the tAA'o terminal articles, on the posterior border, that of the 
