16 CLASSIFICATION OF MOSQUITOES. 
13. Costa-of the wines notspottedi=se- 4 se eeee eee” eee esses eee teas RS RS 14 
Costa black-scaled and with three large spots of pale yellow scales. (Middle 
Americal). 22 Sees ee ey ee ee ee te eps ea ec yeaa ne eer ee fae eens Tutzia. 
14. Thorax with two distinct bare stripes near the middle of the upper side; hind 
cross vein at least its own length from the small cross vein.....------ Culicella. 
Thorax without bare'stripés::_- 2 #24 34ose ese sees aoe ce ce ee eee 15 
15. Scales of the wings collected into spots; hind cross vein much less than its length 
trom tb ersmiall Cross Viele: 2se oes ese a eee ea eee Theobaldia. 
Seales of the wings uniformly distributed: +2 s225..2--2 22 s2e-= ee eee 16 
16. Hind cross vein much less than its own length from the small cross vein. Culiseta. 
Hind cross vein situated at least nearly its own length from the small cross 
VEU vices cana ceeiNae a Se ee lke ce ee Cee Sie aye eee Culex. 
17. Basal half of the wings having the outstanding scales of the veins narrow and 
almost linear; proboscis wholly black= 22 )22- 2 S22 -2e5s--e- ose Melanoconion. 
Basal half of the wings having many broad, outstanding scales on the veins. 20 
18. Wing veins having the outstanding scales narrow, almost linear ....----.--- 19 
Wing veins having the outstanding scales rather broad, oblanceolate; palpi of the 
male almost one-half, those of the female less than one-fifth, as long as the pro- 
OSCIS se eo oe oe Ra ie aie oe: See es oe eee See ee eee eee Tinolestes. 
19. Palpi in both sexes about one-third as long as the proboscis. -....---- Micraédes. 
Palpi in both sexes less than one-fifth as long as the proboscis. Jsostomyia n. gen. 
20. The outstanding scales on the veins of the wings only moderately broad, over 
twice as long as broad, their apices rounded; proboscis and feet usually with 
light-colored abands. 22 26252 oe. cece ee eee seer Teniorhynchus. 
The outstanding scales chiefly unusually broad, their apices flat or hollowed 
(3) 0 | Oe eh RE ey ee ene, ee rN Peer ON AC Se SSC Mansonia. 
21. Outstanding scales on the wing veins unusually broad; femora toward their 
apices bearing several elongate, outstanding scales; body devoid of blue scales. 
Aédeomyia. 
Outstanding scales on the wing veins narrow, almost linear, legs devoid of out- 
standing scales, head and body chiefly blue scaled .....-..-.----.-.------ 22 
bo 
w 
Base of the first submarginal cell nearer to the base of the wing than is that of 
the second posterior cell; palpi of the male Jess than one-fifth as long as the 
proboscis, the abdomen bearing only a few hairs on the under side of the penul- 
timate Beoment!\. 555 eters ate eye ae ae See eee ee Heemagogus. 
Base of the first submarginal cell noticeably nearer to the apex of the wing than 
is the base of the second posterior cell; palpi of the male about one-half as long 
as the proboscis; abdomen of the male with a large cluster of outstanding, 
blunt spines on the under side of the penultimate segment... .Cacomyia n. gen. 
23. Scutellum bearing both broad and narrow scales; head behind covered with 
broad appressed scales except a median stripe of rather narrow ones; outstand- 
ing scales on the wing veins narrow. (Middle America.) -.---- Gymnometopa. 
Scutellumy wathemarnowy; seal esmoliy se se = eee yeaa ee 24 
24. Back of the head covered with broad appressed scales except a median stripe of 
rather narrow ones; outstanding scales on the wing veins narrow. (Middle 
SA THVOT CA) os a .cte nce see oe ee See ee ee bette eee Howardina. 
Back of the head with narrow scales only; many rather broad, outstanding 
SeMleshrosok Hover ny PUMA AKIN ore ees econ oe ono Sacco SsouseorescSnos Pneumaculex. 
Genus LEPIDOSIA Coquillett. 
Our two species have the scales of the abdomen deep blue, except those of the first 
segment and a broad, usually interrupted band on the apices of the other seg- 
ments, which are pale yellow or whitish. 
Hind: feet wholly. bladk 2. so4 22 eae se Seep ee ea ae ae eee cyanescens Coq. 
Te tinavel sieteim lollzvellen Hovey Iarsin fowbol WylOWtKe = = 5 oe ge aaeee Goes Ssccansce mexicana Bell. 
