Dec, 1907.] Dyar & Knab : Mosquitoes from Canal Zone. 205 



bronzy luster, the knees capped with silvery, hind tibiae with a large silvery spot at 

 the apex, tarsi narrowly ringed with silvery white at the bases of the joints, the last 

 joint of the hind tarsi dark on the apical two thirds ; claws simple ; scales of the wing- 

 veins brown. I^ength, 3 mm. 



J> . — Palpi long and very slender, nearly as long as the proboscis, black scaled 

 without white rings ; abdomen dark scaled with distinct bronzy luster and with nar- 

 row basal segmentary white bands, which become dilated at the sides, beneath uni- 

 formly silvery white, except the extreme apex. Length, 2.5 mm. 



Seven speciimens, Tabernilla, Canal Zone, Panama (August Busck, 

 collector), bred from larvae in water in the leaves of Bromelias. 



Type. — No. 10871, U. S. National Museum. 



Nearly allied to Oilex /w/Za/'c';- Theobald, but the thoracic mark- 

 ings less silvery and the tarsal bandings narrower. 



We describe this form as a variety of Culex jenningsi Dyar & 

 Knab, in which the thorax is ornamented. The basal abdominal 

 \)dSiA?, o{ jenningsi zxt lost in this form, but maybe seen under the 

 microscope as 3 or 4 scales at the bases of the segments. The white 

 rings on the tarsi are of a different width. 



The larva is closely similar to that of Culex rejector Dyar & Knab, 

 unbred, found in Bromelias at Cordoba, Mexico. It is possible that 

 the species is the same, but we await the receipt of adults from Mexico 

 before a final decision. 



Culex hesitator, new species. 



9 . — Proboscis moderately long, very slightly broadened towards apex, black 

 scaled ; palpi short, black ; occiput clothed with recumbent whitish scales and with 

 erect black forked ones; mesonotum uniformly rich brown with slight bronzy luster ; 

 pleura very pale brownish with an indistinct dark longitudinal shade ; metanotum 

 pale grayish brown ; abdomen depressed, truncate at the tip, black scaled above with 

 coppery and greenish luster, marginal hairs of the segments pale yellow, lateral white 

 basal spots present, those on the terminal segments largest, venter black, with distinct 

 white basal bands ; legs dark with bronzy luster ; wing-veins uniformly brown scaled ; 

 claws simple. Length, 3 mm. 



$ . — Palpi much longer than the proboscis, the last two segments projecting 

 beyond it, brown scaled, not ringed ; antenna; densely plumose ; abdomen with basal 

 silvery-white bands above, broadest on the fourth and fifth segments and much pro- 

 longed on the sides on the sixth and seventh segments. Length, 3.5 mm. 



Seven specimens. Las Cacadas, Canal Zone, Panama (August 

 Busck, collector), bred from pupae captured in a small swampy stream. 



Tjpe. — No. 10872, U. S. National Museum. 



Allied to Cu/ex extricator Dyar and Knab, but the banding of the 

 abdomen beneath differs. 



