10 A Monograph of Culicidae. 
as in the Culicidae as a family, that the scale structure is the 
best to take for generic distinction. This grouping is based 
entirely on the scales of the head thorax, abdomen, and to some 
extent on the wings. It will be noticed that by these characters 
a natural grouping is formed, and that it, in the main, tallies 
with what we know of grouping them by their larval structure. 
I do not think that the minute structural differences in the 
larvae should be taken as of greater value than specific 
characters ; but it is of interest to find that classification by 
certain larval and certain adult characters give the same result. 
The following genera may be recognised :-— 
Genus 1. ANOPHELES. Meigen. 
. Myzomytia. Blanchard. 
CYCLOLEPPTERON. Theobald. 
STetHoMYIA. Theobald. 
. PyreropHorus. Blanchard. 
. ARRIBALZAGIA. Nov. gen. 
. MyzorHyncuvus. Blanchard. 
NyssorHyncuHus. Blanchard. 
CreLuia. Theobald. - 
ALDRICHIA. nov. gen. 
SOMNAAIHF wr 
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These genera may be tabulated as follows :— 
Wing scales lanceolate Anopheles. 
Prothoracic lobes}Wing scales mostly 
simple; no flat; long and narrow ... Myzomyia. 
head scales. Wing scales partly 
large and inflated ... Cycloleppteron. 
Thorax and ab- 
domen with 
hair-like curved 
scales. Prothoracic lobes 
mammillated: 
median flat 
head scales. 
Wing scales lanceolate Stethomyia. 
Thorax with | 
eee oe Wing scales small, lanceolate or narrowed Pyretophorus. 
men hairy. | 
Thorax with hair-like curved scales, some narrow-curved 
ones in front; abdomen with apical lateral scale tufts 
and Sealy vember, WO VeEMbraliGUEt: <s2e..cecncscesncnceweceees =pum Arribalzagia. 
Thorax with hair-like curved scales; abdominal scales on 
venter only, with a distinct ventral apical tuft; no lateral 
EUS. Gia sta Sole «<1. Tles'ss Saeuige aesapgasma dts eisameiaeas degons axctuuerepuesdte Myzorhynchus. 
Abdominal scales as lateral tufts and 
dorsal patches of small flat scales; thor- 
Thorax and ab- acic narrow-curved or spindle shaped Nyssorhynchus. 
domen with {Abdomen nearly completely scaled with 
true scales, irregular scales and with lateral tufts Cellia. 
Abdomen completely scaled with large 
flat scales as In ‘Crlew Wi A teenees Aldrichia. 
