352 Dr. 0. P. Alexander on African Cranp-flies 



Presented by the Imperial Bureau of Entomology, 

 1914. 142. 



Type in the collection of the British Museum (Natural 

 History). 



This beautiful PseudoHinnophila is even closer to P. 

 rhodesia (Alexander) of Rhodesia than it is to P. cincti- 

 femur ; from the former it differs in tlie coloration of the 

 mesonotum ; the wing- pattern is much heavier, the spots 

 along most of the veins being confluent with one another 

 afcross the intervening cells ; in the costal cell an almost 

 regular series of about fifteen broAvn dots ; the venational 

 details are slightly different, especially in the length of the 

 veins beyond cell 1*^ M^. The colour of the legs in 

 P. rhodesiee is unknown. These three species form a rather 

 isolated group of the genus distinguished by the beautifully 

 patterned wings and the very small cell \st M^. 



Tribe L i m n o p h i l i n i. 

 Genus Limnophila, Macquart. 



Limnophila distigma, sp. n. 



Head grey ; mesonotal prsescutum yellowish grey with 

 four darker stripes ; pleura with a narrow brown longi- 

 tudinal stripe ; mesosternuni dark brown : wings pale grey, 

 sparsely spotted with dark brown at the forks and ends of 

 the veins ; r at the tip of R^ ; basal deflection of Cmj at mid- 

 length of cell 15/ M^- 



^^37?— Wing 8-7 mm. 



Rostrum and palpi dark brown. Antennye with the basal 

 segment yellow ; remainder of the anteunse broken. Head 

 grey ; eyes large, the vertex between them narrow. 



Pronotum pale grey ; prosteruiim distinct, separating tlie 

 fore coxae, ap[)earing as a narrow, dark-coloured plate. 

 Mesonotal prajscutuni pale yellowish grey with four darker 

 stripes, the long intermediate pair narrowly separated by 

 an indistinct, capillary, pale line ; lateral stripes less distinct ; 

 scutum and scutellum pale yellowish grey, the lobes of the 

 former indistinctly marked with brown ; postnotum clear 

 light grey. Pleura obscure browuisli yellow with a rather 

 narrow, interrupted, dark brown stripe extending from the 

 propleura across the mesepisternum, ending as a rounded 

 spot on the mesepimeron ; a spot on the mesepisternum, 

 ventrad of the stripe ; mesosternuni dark l)rown. Halteres 

 dull yellow, the knobs brown. Legs with the coxse pale 



