/o 



A New Genus 



AND TWO NEW SPECIES OF CULICID* 



FROM THE Sudan 



BY 



Feed. Y. Theohald, M.A., F.E.S. 



Imperial Ottoman Order of the Osmanieh ; Grand Medallist of the Society Nationale d'Aoclimatation do 



France; Honorary Member Soci(5te de Pathologie Exotique, Association of Economic Entomologists (U.S.A.), 



Royal Horticultural Society, etc. ; Vice Principal of the S.E. Agricultural College, Wye. 



Genus : Dicemnn/ia, iiov. gen. 



Head clotlied witli narrow curved scales and nunierons npriglit forked scales except Octius: 

 at the sides where tliey are flat; female palpi short, slightly swollen apically ; antennae " ' • 

 pilose, basal segment with scales and liairs; palpi of $ slightly longer than the 

 proboscis, thin, no hair tufts, last segment very small; antennae plumose, scaly on two 

 basal segments ; proboscis showing traces of a joint on apical half. 



Thorax with narrow curved scales ; prothoracic lobes with scales and long chaetse ; 

 scutellum with flat scales, narrow-curved ones on each side of mid lobe, posterior border 

 bristles of mid lobe in double line. Abdomen normal. Male genitalia with short 

 broad basal lobe with very long stalked flat scales on the inner side, a tuft of curved 

 hairs at the apex and forked claspers (vide Plate X., fig. 3 ; also fig. 18). 



. Wings with normal venation, densely scaled with Mansonia scales, broad spatulate 

 ones and thin linear ones. 



This genus comes near Newsteadina, Theobald, but differs in (1) the $ palpi being 

 short and not longer than half the length of the proboscis, (2) in the absence of long 

 hairy scales on the basal segments of the ,t antenna and (3) in the presence of flat scales 

 on most of the scutellum. 



From Orthopodoinyia, Theobald, it also differs in the longer $ palpi and much 

 shorter $ palpi and also in squamose characters. 



The male genitalia are very marked. 



Mansonia (?) nigra, Theobald (Second Report, WeJlcoine Tropical Ttofcarcli LaliDratoricK, 

 Khartoum, p. 80, 1906), also apparently belongs to tliis genus. 



Diceroinijia africana, nov. sp. 

 (Plate X.) 



Thorax dark brown with dark scales, pleurae with white puncta. Abdomen deep brown, niifromyia 

 witli latei'al shi)rt white median lines, in some cases reaching across the segments. ".'''"'""' 

 Head dark with two pale spots; proboscis black with a wliite band. Legs dark brownish- 

 black, with basal white bands and bases of femora pale, femora and tibiic mottled. ^Yings 

 tliickly scaled with dark brown and some scattered pale scales. 



$ Head l)lack with dark and some pale curved scales, the latter forming two more or 

 less distinct spots, black upright forked scales rather numerous, flat white and then black 

 scales at the sides ; clypeus dark with some small flat scales ; proboscis black with a broad 

 white band and black hairs ; antennse dark brown with paler rings, basal segment dark with 

 some flat yellow scales; palpi black, short. 



