316 Dr. C. P. Alexander on 



tlie possession of a supernumerary cross- vein in cell i?2> 

 The case is entirely analogous to the sul)genus Dicranu- 

 phragma, Osteu-Sucken, in the genus Limnophila , Macquart. 

 Type of the subgenus. — Pseudolimnophila {Calolimnophila) 

 rex, Alexander (Uganda). 



Pseudolimnophila {Calolimnophila) princeps, sp. n. 



General coloration yellowish brown ; first flagellar seg- 

 ment pale ; mesonotum with a capillary, dark brown, median 

 line ; wings brown, spotted and clouded with darker, the 

 costal margin alternately yellow and brown ; abdominal 

 sternites bicolorous. 



Male. — Length about 9 mm. ; wing 10'5 mm. 



Rostrum and palpi brown. Antennae with the first 

 segment pale, sparsely silvery-pruinose ; second segment 

 l)rown ; first flagellar segment conspicuously liglit yellow; 

 remaining flagellar segments dark brown with a conspicuous 

 white pubescence. Head brown with a greyish-yellow 

 pollen ; vertex very strongly narrowed behind. 



Prouotum brownish yellow, dark brown medially. ]\Ieso- 

 notal prsescutum yellowish bi'own with a capillary brown 

 median line ; lateral margins of prtescutum broadly paler 

 brown, enclosing a circular yellow spot immediately behind 

 the pseudosutural fovese ; extreme anterior margin of prre- 

 scntum narrowly darkened ; scutum light yellowish brown, 

 the median area and each lobe indistinctly lined with brown ; 

 a brownish-black spot on the lateral margin of the prte- 

 scutum al)ove the wing-root ; scutellum and postuotum 

 light yellowish brown with an indistinct brown median line. 

 Pleura yellowish testaceous, the dorsal pleurites largely 

 suffused with brown. Halteres short, dark brown, the base 

 of the stem paler. Legs with the coxse pale, testaceous, the 

 extreme bases darkened; remainder of legs pale brownish 

 yellow. Wings with a strong brownish tinge, spotted and 

 clouded with still darker brown, these areas distributed as 

 follows : At origin of Rs, tip of Sc, above the fork of /?2+35 

 tip of Ri, at the supernumerary cross-vein in cell A'2, tip of 

 R2, along the cord and outer end of cell 1st M^', more diffuse 

 .clouds at ends of the longitudinal veins ; a series of about 

 five small spots behind vein Cu ; the anterior region of the 

 wing in the radial cells is variegated with yellow, these spots 

 lying between the brown spots, the most consjucuous beyond 

 Sci and R^ ; veins dark brown. Venation : A supernu- 

 merary cross-vein in cell Rj at about two-thirds the length 



