76 INSECUTOR INSCITlyt MENSTRUUS 



THREE NEW NEOTROPICAL MOSQUITOES 



By HARRISON G. DYAR and FREDERICK KNAB 



Sabethes chroiopus, new species. 



Male : Proboscis moderate, distinctly swollen toward apex, clothed 

 with violaceous scales. Palpi short, violet-black scaled. Clypeus promi- 

 nent, subtriangular, flattened, luteous, with silvery white pubescence along 

 margins. Antennae slender, filiform, the last two joints somewhat longer, 

 the others subequal, with basal whorls of very long, rather sparse hairs 

 and median whorls of very short hairs ; tori black, nude. Occiput clothed 

 with dark metallic violet and blue scales. 



Prothoracic lobes large and collar-like, clothed with dark metallic blue 

 scales with green and violaceous reflections. Mesonotum and scutellum 

 clothed with metallic scales, changing from blue to green and bronze in 

 different lights. Postnotum piceous, with a distinct median lobe, with 

 several cocirse black bristles posteriorly ; without sceJes. 



Abdomen long and slender, broadest at base and apex ; dorsal vesti- 

 ture dark metallic blue with iridescent reflections, venter pale golden 

 scaled, the colors separated on the sides in a nearly straight line ; apex 

 with dorsal and lateral tufts of coarse black bristles ; lateral ciliation short 

 and very fine, rather sparse, pale. 



Wings hyaline, narrow ; second marginal cell much more than twice 

 the length of its petiole, anterior and posterior cross-veins very nearly inci- 

 dent ; scales moderately broad, subtruncate. 



Legs long and slender, dark metallic violet scaled, the middle pair only 

 with paddle-shaped scale-tufts ; paddles involving the outer half of tibia 

 and all of first tarsal joint, showing a slight indentation at tibio-tarsal artic- 

 ulation ; scales of paddles mostly black, a white apical patch on anterior 

 side of tibia, a subapical white patch on anterior side of first tarsal and 

 an apical white patch on its posterior side. Claws simple and equal on 

 front and hind legs, unequal on mid pair, with one of them modified. 



Length: Body about 5.5 mm.; wing, 4 mm. 



Potaro Highlands, British Guiana, May, 1909 (de Freitas, through 

 W. H. B. Moore). 



Type: Cat. No. 15999, U S. Nat. Mus. 



Most nearly related to Sabethes bipartipes D. cind K., but differing 

 in the disposition of the white on the scale-paddles of the middle legs. 



