140 Annals of the South African Museum. 



Mesonotum and pleura shiny orange without markings. Halteres 

 dark brown. Legs with the coxae and trochauters orange-yellow ; 

 femora yellow broadly tipped with black ; tibiae yellowish-brown, the 

 apices black ; tarsi broken. Wings with the ground-colour light 

 yellowish, most intense in the costal area, the apex and anal cells 

 darker, greyish ; a brown seam along the cord ; a similar interrupted 

 seam at the tip of B^ fork of -R 4 + 5 , the fork of M and about mid- 

 length of Cu beyond the m-cu cross-vein. Venation, (Plate X, fig. 1, 

 upper left hand corner), Rs very short, less than the r-rn cross-vein ; 

 deflection of B+ 5 puuctiform ; r-m longer than m-cu ; apical cells of 

 the wings pubescent. 



Abdomen yellowish-orange, dark brownish-black along the mid- 

 dorsal line of the tergum ; apical segments destroyed excepting the 

 hypopygium, which is orange. 



Habitat. South Africa. 



Holotype, $ , M'fongosi, Zululand, February, 1914 (W. E. Jones). 



Type in the South African Museum. 



This is the first representative of this family of flies to be discovered 

 in Africa and the first species of Ptychoptera to be described from the 

 southern hemisphere. 



FAMILY TIPULIDAE. 



SUB-FAMILY LIMNOBIINAE. 



TKIBE LIMNOBIINI. 



GEN. DICEANOMYIA, Stephens. 

 1829. Cat. Brit. Ins., vol. 2, p. 243. 



DlCRANOMYIA LIGHTFOOTI, Sp. U. 



Antennae black ; thorax light brown, thoracic stripes dark brown ; 

 pleura yellow with two dark brown stripes ; wings greyish subhyaline ; 

 cell 1st Me, open ; subcosta short. 



Male. Length 4'7 mm. ; wing 6'8 mm. 



Rostrum and palpi dark brownish-black. Antennae black, short, 

 the flagellar segments globular, moniliform. Head brownish-grey. 



Mesouotal praescutum light brown with a very broad dark brown 

 median stripe ; lateral stripes shorter ; scutum with the lobes brown ; 

 scutellum brownish-grey ; postnotum brown. Pleura dull yellow with 

 two dark brown stripes, the dorsal stripe extending from the cervical 

 sclerites underneath the base of the halter to the abdomen ; ventral 



