﻿8 F. W. EDWARDS — A SYNOPSIS OF THE SPECIES OF 



If the genus as now defined is dismembered, it may be found necessary to 

 restrict it to the type species, S.fasciata, which has a very peculiar character in 

 the scaly clypeus. However, the line taken by Dyar and Knab of sinking both 

 Stegomyia and Ochlerotatus under Aedes would be wiser, probably, than further 

 subdivision. A middle course has been adopted here. 



The specific characters which are most readily appreciated are found in the 

 markings of the hind tarsi, and these have been used for purposes of tabulation. 

 Other characters of diagnostic value are given under each species. All the 

 species are black with white or silvery markings. 



Table of the Species. 



1. Hind tarsi entirely dark (Desvoidya) ... . . ... ... 11. 



Hind tarsi with white rings ... ... ... ... ... ... 2. 



2. Rings on first four joints of hind tarsi almost equal in length, last 



joint usually all white (compare Ochlerotatus fascipalpis, which 



may belong here) ... ... ... ... ... ... ... 3. 



Rings on hind tarsi not so arranged {Kingia) ... ... ... 4. 



3. Clypeus scaly ; thorax with lyre-shaped white marks (Stego- 



myia) ... ... ... ... ... ... ... 1. fasciata. 



Clypeus not scaly; thorax with six small white spots ... 2. sugens. 



4. Last two joints of hind tarsi all white ; middle femora practically 



all black in front ... ... ... ... ... 3. pseudonigeria. 



Last two joints of hind tarsi not all white ; middle femora with a 



conspicuous white or silvery spot near the middle in front ... 5. 



5. White ring on third joint of hind tarsi much broader and more con- 



spicuous than the others ; head partly yellow ... ... ... 6. 



White ring on third joint not very broad, though that on the fourth 



maybe; head not at all yellow ... ... ... ... ... 7. 



6. Hind tibiae with a large white patch at the base beneath ; head- 



scales mostly black, leaving a small yellow patch in the 

 middle ... ... ... ... ... ... ... 4. africana. 



Hind tibiae with a very small yellow patch at the base beneath ; 



head-scales mostly deep yellow ... ... ... 5. luteocephala. 



7. Fourth joint of hind tarsi mostly or all white ... ... ... 8. 



Fourth joint of hind tarsi mostly or all black ; fifth, mostly or all 



white ; all segments of abdomen with broad white bands ... 10. 



8. Thorax with a thin median yellow line ; abdomen with all seg- 



ments banded ... ... ... ... ... ... 6. poweri. 



Thorax without such line, abdomen with segments 1-3 or 1-4 



unhanded ... ... ... ... ... ... ... ... 9. 



9. Lateral lobes of scutellum with black scales, last joint of hind tarsi 



almost all black ... ... ... ... ... 7. apicoargentea. 



Lateral lobes of scutellum with white scales, last joint of hind tarsi 



almost all white ... ... ... ... ... ... 8. fraseri. 



