24 CLASSIFICATION OF MOSQUITOES. 
2. Thorax on the anterior half golden-yellow-scaled and with a pair of black-scaled 
spots, the posterior half black-scaled and with two stripes of yellow scales. 
(Middle -Asserica.)/o_.2. cB =~ at ie see Sree ene eee spissipes Theob. 
Thorax whelly- golden-brown-sealed 22222222 see = soe ee Bee 
3. Abdomen with bands of yellowish scales at the bases of the segments. (Middle 
WAT OTICAI i nos ake Se oes ors ete aja ee OTS ee eee A = ee humilis Theob. 
Abdomen unbanded -23..0cc2 ec ese cede se winen es ee oe See eee 4 
4, Front angles of the segments of the abdomen yellowish-scaled_ ..-- atratus Theob. 
Front angles and whole of the abdominal segments black-sealed. 
indecorabilis Theob., melanurus Coq. 
Genus TINOLESTES Coquillett. 
Feet unicolorous black; scales of the upper side of the body black and with light- 
colored ones in the front angles of some of the segments of the abdomen. 
latisquama Coq. 
Genus MICRAEDES Coquillett. 
Proboscis and feet unicolorous black; scales of the abdomen purple-black and with 
light-colored ones in the front angles of some of the segments------ bisulcatus Coq. 
Genus ISOSTOMYIA Coquillett. 
Proboscis, feet and abdomen wholly black-scaled ..-...-...-------- perturbans Will. 
( Aédes nigricorpus Theobald may also belong to this genus. ) 
Genus THNIORHYNCHUS Arribalzaga. 
(Synonym: Coquillettidia Dyar. ) 
(«) TABLE OF THE SPECIES. 
1. Seales of the wings mixed black and light colored, those of the costa not forming 
distinct spots; scales of the feet black and with white ones at the bases of some 
Of the: joints: 22.222 ksi. Sane oes ee geet een eee eR eee 2 
Scales of the wings wholly black. (Middle America.) ..-.-. ........-:------- 3 
2. Abdomen black-scaled and with a white band at the base ai each segment; hind 
tibize with a broad light-colored band before the apex.-.-.-..--- perturbans Walk. 
Abdomen golden-yellow scaled and with several black scales on the first three 
segments; hind tibize devoid of a distinct light-colored band. (Middle Amer- 
TCR A ok west 3 Sako Le Bs Ae men nc crereeate cee ars Stein ee ree eee eee flaveolus Coq. 
3. Feet black-scaled and with white bands at the sutures of some of the joints, femora 
with a whitish spot or band at a point near three-fourths of their length. ---- 4 
Feet wholly black except at the base of the first joint, femora devoid of a distinct 
white mark near three-fourths of their length; abdomen black-scaled and with 
a white band or median spot at the base of each of the last four segments and a 
white spot in the front angles of each segment ..-..-..-----.---- palliatus Coq. 
4. Scales on the upper side of the abdomen black and with spots of white ones along 
the sidés. = .ic34 stot che set eda oe ) See ee. See eee ere ete ee ee 5 
Seales on the abdomen wholly black, on the thorax wholly brown. 
arribalzagex Theob. 
5. White spots on the sides of the abdomen situated in the front angles of the seg- 
ments; scales in the middle of the thorax yellow, those toward the sides chiefly 
Dlack 2S 222.- Geek too be eee ee ee eee nigricans Coq. 
White spots on the sides of the abdomen situated near the middle of the seg- 
ments; scales of the thorax brown and with several lines of light yellow ones. 
fasciolatus Arrib, 
