An Account of the Bird-lice of the Genus Docophorus. 175 
From their base outwards the telomera are gradually expanded into a 
distinct head, whose distal edges slope sharply. 
The penis just reaches beyond the telomera. 
The hypomeron is as in calvus. 
Length of the apparatus, °> mm. 
Docophorus merguli, D. 
The basal plate is at its widest anteriorly, and is little longer than the 
extruded apparatus. The paramera are long and narrow, except on their 
basal third. - The ventral hair before half. 
‘The outer sides of the endomera are practically straight and parallel to 
one another. The distal edge of each slopes slightly towards the penis but 
does not run directly to that part, there being a somewhat pronounced notch 
on each side of the penis. The endomera are not apically produced and 
reflected, thus in association they present a quadrate facies. Each endomeron 
bears distally 4-5 ventral hairs. Apically the endomera are somewhat 
apart. 
The central pattern of the mesosome is pear-shaped; the basal articula- 
tion short and narrow. 
The telomera, hypomeron and penis are closely associated. The former 
may be distinguished, by careful dissection, as two short, broad processes 
which do not form a head or hook. 
The hypomeron seems inseparable from the penis, which appears as if 
thickened basally. Owing to the small size of the endomera the penis- 
hypomeron in this and the following species projects conspicuously. 
Length of apparatus, 35 mm. 
Docophorus megacephalus, D. 
The basal plate is, in proportion to the exserted part of the genitalia, 
even shorter than in merguli. The plate is also more coloured than in the 
others of the group, being entirely dark save for a short semi-circular space 
near the junction of the paramera, and another spot in front. Bases of the 
paramera evenly rounded on the upper internal aspect. The paramera are 
broad to beyond half, and thereafter contracted gradually on the outer edges, 
while the inner remain straight. The ventral hair is placed just beyond 
half, 
The endomera are roughly triangular with curved sides, and are widely 
apart distally, without any recurved apex. Their inner edges are convergent 
without actually meeting. On inner ventral edge of each parameron from the 
