A Synoptical View cf the Mosquitoes of British Guiana. 189 
Table of Sub=Families. 
A. Scutellum simple, never trilobed. Proboscis straight ; palpi long in male 
and female. 
ANOPHELINAE. 
A.A. Scutellum trilobed 
a. Proboscis strongly recurved ; Ist sub-marginal cell very small. 
MEGARHININAE. 
aa. Proboscis straight ; metanotum nude. 
b. Wings with six long scaled veins. 
c. Antennae with 2nd. joint normal in length. 
d. 1st sub-marginal cell as long as or longer than 2nd. posterior cell. 
e. Female palpi shorter than proboscis, male palpi long. 
CULICINAE. 
ee. Palpi short in male and female. 
AEDINAE. 
dd. 1st sub-marginal cell very small, smaller than 2nd. posterior cell. 
URANOTAENINAE. 
ec. Antennae 2nd. segment very long... 2 DEINOCERATINAE. 
bb. Wings with seven long scaled veins x .. HEPTAPHLEBOMYINAE. 
a.a.a. Proboscis straight ; metanotum with scales or 
chaetae. 
b. Palpi longinmale,shortinfemale .. ot TRICHOPROSOPONINAE. 
b.b. Palpi short in male and female Si 3 DENDROMYINAE. 
a.a.a.a. Proboscis elbowed oe ie + os LIMATINAE. 
This last sub-family might, to be consistent, be placed on the character of the proboscis in a 
separate group, Ankylorynchae; but after ail perfect consistency is unattainable and perhaps at 
best a trifling goal. 
Sub-Family Anopbelinae. 
Five genera are represented in the colony. I give also the diagnosis of 
Anopheles as it is the type genus, though not represented locally. 
Table of Genera. 
1st sub-marginal cell large. 
Antennal segments without dense lateral scale tutts. 
A. Thorax and abdomen with hair-like curved scales. 
a. Head with cuneiform scales, no flat ones. 
b. Basal lobe of genitalia of one segment. 
Wing scales rather large, lanceolate. |. ANOPHELES, Meigen. 
Wing scales mostly small, narrow or slightly lanceolate ; costa promi- 
nently spotted. .. ee = ad 2. Myzomyta. 
Blanchard, 
