20 
bo 
. Proboscis destitute of a white ring near the middle._.........-. Ne Spt eee sg Ste ue e 
Proboscis marked with such a ring, bases of tarsal joints white. ; 
teniorhynchus Wied. 
; + 
3. Bases of tarsal joints distinctly white 
Bases of tarsal joints never white-2-s- 2-2 52 22 22-2 =. ae ee 5. 
4. Mesonotum marked with four stripes of silvery scales..........- fasciatus Fabr. 
Mesonotum destitute of such stripes: 
Eiith yointtot-hind darsiqwhites 22 = eee Sosa eee teniatus Wied. 
Fifth joint, except its extreme base, dark brown .......--- stimulans Walk. 
5: ast two jointsiot hind tarsi mever wihites.—2 4° =- == see ee 
Last two joints of hind tarsi snow white.---.........-....---- posticatus Wied. 
6. Abdomen marked with a cross band of whitish scales at base of each segment. 
impiger Walk. 
Abdomen never marked in this manner, but with a cluster of whitish scales at 
front aneles Ol SOME Ola Me seomMe nits 5 sae ee ene triseriatus Say. 
7. Proboscis marked with a distinct whitish ring near the middle, tarsi white at 
sutures of the joints. 22 cee a5 Soe ee ee eae eee 8 
|  Proboseis destitute of a whitish ring near the middle...................._-- ; 
So larsal joimtsiw bite atbasesyoniliveene sje 2 te ee ee ee eee perturbans Walk.! 
farsal jomtsawhitesat both ends. a2 5 sa-5 ee ee tarsalis Coq. 
9. Larsic white at bases of jounls av sese 2 ay eee eee ee 10. 
Parsi never whiteat/ bases ofthe joints: 2.2 25. ee ee 12. 
10. Mesonotum never marked with stripes of silvery scales............-.....-- IRE 
Mesonotum marked with four stripes of silvery scales, first tarsal joint never 
marked with a whitish ring near the middle .............-..-..- signifer Coq. 
11. First tarsal joint marked with a whitish ring near middle of each. 
excrucians Walk. 
Kirst tarsal joint destitute of such airing == 2-22 22). a2 oe excitans Walk. 
12. Petiole of submarginal cell less than one-third of the length of that cell. 
pungens Wied. 
Petiole of submarginal cell at least almost one-half of the length of that cell. 
consobrinus Desv. 
(6) UNRECOGNIZED SPECIES. 
annulatus Schrank. This European species was credited to our fauna by Osten 
Sacken. The description agrees fairly well with specimens which I have identified 
as excitans, Walker, except that in the latter there is no white ring on the femora 
toward their apices. 
bosct Desy. Probably a rubbed specimen of pungens. 
nigripes Zett. Black, the legs of the male dark yellow, hairs of pleura of female 
gray, a band of white scales at base of each segment of her abdomen. 
rubidus Desv. The description was apparently founded on a rubbed specimen of 
Psorophora ciliata. 
testaceus v. d. Wulp. Is probably a somewhat injured example of consobrinus. 
incidens Thomson. Is evidently a synonym of impiger Walker. 
bigott Bellardi. According to the figure and description, the bands of black scales 
are at the bases of the abdominal segments; in the recognized species these bands are 
always at the apices of the segments. In other respects this species must greatly 
resemble pungens. 
cubensis Bigot. Apparently founded on a badly rubbed specimen of pungens. 
frater Desy. This name was proposed for the Culex fasciatus of Wiedemann, under 
the impression that this is not the same species as the one described by Fabricius 
under the same name. It seems quite certain, however, that the word ‘‘proboscis’’ 
in Fabricius’ description was simply a lapsus for ‘‘ palpi,’’? and with this emendation 
the two descriptions agree very well. 
mexicana Bellardi. Is evidently a synonym of posticatus. 
provocans Walker. Is probably a synonym of stimulans. In some specimens of 
this species the light color at the bases of the tarsal joints is very indistinct. 
territans Walker. Is apparently a synonym oi pungens. 
Mr. F. V. Theobald, after studying Walker’s type of perturbans, writes us that it 
has toothed claws in the female. 
