The Crane-flies of South Africa {Dq^tera, TipuUdae). 159 
for typical bicauda ; the second pair of " tails " described by Dr. Speiser 
are presumal)ly the sterual valves of the ovipositor. 
The female specimen offers the following measurements: Length 
13-3 mm. ; wing 20-2 mm. ; fore femur 97 mm ; hind femur 16 mm. 
The abdomen in the specimen at hand is greatly shortened, the inter- 
mediate segments being crowded and telescoped together, the terminal 
segment (Plate XIII, fig. 42) elongate, cylindrical-tubular, the tergal 
valves rather short, curved gently upwards, the apices acute ; sternal 
valves shorter, straight, and high, the apices rounded to subacute; 
along the dorsal margin a groove containing tufts of long pale hairs ; 
viewed from above the tergal valves are strongly divergent apically, 
the sterual valves nearly parallel. The wing venation is shown in 
Plate XI, fig. 23 ; the colour of the membrane is the peculiar whitish 
tinge characteristic of the genus ; the apex and the margin around to 
the first anal vein is indistinctly and very faintly tinged with dusky, 
small pale brown clouds as follows : origin of the sector ; r-7n cross- 
vein ; apex of (7»o and second anal. 
Megistocera hirsuta, sp. n. 
Thoracic praescutum greyish-yellow with four brownish-grey stripes ; 
thorax with a dense covering of long, pale hairs ; wings without dark 
markings. 
Male. — Length 15 mm. ; wing 20 mm. 
Frontal prolongation of the head moderately long, shiny, shorter 
than the first anteunal segment in this sex, brownish-yellow, nasus 
distinct ; palpi yellowish, darkened towards their tips. Antennae with 
the scapal segments brownish-yellow, the first segment greatly 
enlarged, the flagellum broken. Head greyish-yellow with a broad 
median chestnut area. 
Thoracic dorsum greyish-yellow, the praescutum with four brownish- 
grey stripes of which the median pair are the longest ; the thoracic 
interspaces are reddish ; remainder of the thorax pale whitish, the 
scutellum and postnotum with a delicate reddish median line. Thorax 
with a dense covering of long, pale, erect hairs. Pleura pale with a 
greyish-white bloom. Halteres slender, brown, yellowish at the 
extreme base. Legs with the coxae very small, whitish ; trochanters 
dull yellow ; femora dull yellow, the extreme tip narrowly dark brown ; 
tibiae similar, the apices brown ; tarsi brownish-yellow. Wings with 
the peculiar whitish tinge characteristic of the genus, without seams or 
darker markings on the veins or at the wing-tip. Venation as in 
Plate XI, fig. 24 ; the stigma is of a much paler shade of brown than 
in hicauda, the second anal cell much larger, vein Cu^ more sprawly, etc. 
11 
