NEW CULICIDiE FROM THE FEDERATED MALAY STATES. 257 



Myzomyia rossii, Giles ; Desvoidea ventralis, Walker ; Culex 

 mimeticus, Noe. ; Stegomyia scutellaris, Wlk. ; Tceniorhynchus 

 conopas, Frau. ; T. brevicelhdus, Theob. ; Mansonia annulipes,y^\k. ; 

 M. annulifera, Theob. ; Finlaya poicilia, Theob. 



Genus Stethomyia, Theob. (Mono. Culicid. iii. p. 62, 1903). 



Stethomyia fragilis, n. sp. 



Thorax ochraceous brown ; abdomen, legs, palpi, and proboscis 

 deep brown ; antenufe white with brown plume-hairs. Legs long, 

 delicate. 



^ . Head deep brown with small flat creamy scales between the 

 eyes and partly above ; narrow brown upright forked scales behind ; 

 eyes deep purple ; proboscis long and thin, deep brown, paler at the 

 base ; antennae with testaceous basal joint, apex brown, remainder 

 white with narrow brown rings and brown plume-hairs ; palpi pale 

 brown with deep brown scales, last two joints swollen with a few 

 black bristles ; head united to thorax by rather a long neck. Thorax 

 bright ochraceous brown, almost nude, a few scattered long irregular 

 deep brown hairs; scutellum pale greyish brown, nude; the pale 

 brown border-bristles alternately long and short ; pleurae ochraceous 

 brown with a greyish sheen; metanotum chestnut-brown ; prothoracic 

 lobes ochraceous brown with a few black bristles, very distinctly 

 mammillated. Abdomen very narrow, expanding apically, deep brown 

 to almost black, with longish curved black hairs ; genitalia pale testa- 

 ceous; claspers long and thin. Legs long and thin, deep brown ; coxae 

 very pale ; fore legs with apparently only one claw, which is large 

 and biserrated, one tooth being basal ; mid ungues equal, simple, 

 moderately large, curved ; hind small, equal and simple, nearly straight. 

 Wings with the veins with pale brown lanceolate scales ; those on the 

 subcostal, first long vein and basal part of costa short and rather 

 broad ; first submarginal cell very long and narrow, nearly twice the 

 length of the second posterior cell, both cells about the same width ; 

 base of the first submarginal a long way nearer the base of the wing 

 than the base of the second posterior ; stem of the first submarginal 

 nearly half the length of the cell ; stem of the second posterior nearly 

 twice as long as the cell ; mid cross-vein a little nearer the apex of 

 the wing than the supernumerary ; the posterior cross-vein about half 

 its length nearer the base of the wing than the mid. Halteres with 

 pale stem and slightly fuscous knob, which is curved in the middle. 

 Length 4 mm. 



Tiine of capture. January and December. 



Hab. Kuala Lumpur, Federated Malay States. 



Observations. — Described from two males bred by Dr. Durham. 

 Types in the British Museum (Nat. Hist.). This is the second 

 species of Stethomyia so far known, the other species occurring in 

 S. America. The characters of the genus — namely, the mammil- 

 lated prothoracic lobes and the flat scales between the eyes, &c. — 

 are very marked. It is a very delicate-looking mosquito, and 

 differs completely from the dark S. nimba, Theob. (Mono. Culicid. 

 iii. p. 62). 



