98 Dr. CO. P. Alexander on African Crane-flies 
VIl.—Undescribed Species of African Crane-flies in the 
Collection of the British Museum (Natural History) : 
Tipulide, Diptera.—Part II. Subfamily Tipuline. By 
Cuarues P. Auexanper, Ph.D., Urbana, Illinois, U.S.A. 
THE present paper is a continuation of the first part under 
this title, dealing with the Limnohiine forms in the collection 
of the British Museum. In this instalment the species of 
the Tipuline genus Nephrotoma (Pachyrrhina) are considered. 
The holotypes of all the species are contained in the 
collection of the British Museum (Natural History). 
Nephrotoma chetopyga, sp. u. 
Antenne of the male elongated, flagellum dark brown ; 
head orange, the occipital mark very indistinct ; mesonotal 
prescutum shiny black, the humeral angles yellowish ; 
scutum and scutellum black ; postnotum largely yellow; 
pleura black with a large yellow area before the halteres ; 
wings strongly suffused with yellowish ; apices of cells R; 
and M, with macrotrichiz ; abdomen black, segments two 
to five dull reddish basally ; eighth sternite of the male 
hypopygium rather extensive, the median area clothed with 
conspicuous curved bristles. 
Male.—Length about 13 mm. ; wing 15°5 mm. 
Frontal prolongation of head yellow, the dorso-median 
area dark brown ; palpi dark brownish black. Antenne 
with the first scapal segment orange; second segment 
orange-brown ; flagellum dark brown ; antenne elongated, 
if bent backward extending slightly beyond the base of the 
abdomen. Head orange; occipital mark very indistinct, 
not shiny, pale brown. 
Pronotum black, behind narrowly paler. Mesonotal pre- 
scutum shiny black with only the humeral angles obscure 
yellow; scutum and scutellum shiny black; postnotum 
with the median sclerite light yellow, the caudal margin 
narrowly infuscated ; lateral sclerites yellow, the dorsal- 
posterior third brownish black. Pleura black, the dorso- 
pleural membrane obscure yellow; a large, light yellow 
area before the halteres, including the mesepimeron and the 
lateral sclerites of the postnotum as described above. 
Sternum black. Halteres brown, the base of the stem and 
the apex of the knob yellow. Legs with the coxz black ; 
trochanters conspicuously reddish yellow, the remainder of 
