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FRED. V. THEOBALD 
Genus DENDBOMYTA Theob. 
Monogr. Culicid. III. p. 316. (1903). 
1. Dendromyia quasiluteoventralis Theob. 
Monogr. Culicid. III. 317. (1903). 
A single j from Songo, Bolivia. It is somewhat larger than the 
specimens I have seen from British Guiana. 
Genus POLYLEPIDOMYIA nov. gen. 
(Plates I and IV.) 
Head (Fig. 15a.) clothed with flat scales over all the front, sides 
and centre ; a small area behind of narrow-curved scales and some upright 
forked ones. Palpi short but moderately developed in the $ . Antennæ 
of 5 pilose, verticillate hairs long. Proboscis moderately long. Thorax 
clothed with large, narrow-curved scales ; prothoracic lobes with small flat 
scales ; scutellum (b) with flat scales ; metanotum nude. Apex of ab¬ 
domen very bristly. Wings with Culex-ve nation and scales. 
This genus founded on five j ’s comes apparently in the Aedinæ. 
Both palpi and proboscis show variation in relative lengths. 
The nearest related genera seem to b e Dendromyia and Phoniomyia 
but the absence of metathoracic chaetæ and the different wing scales 
and cephalic ornamentation will at once separate it. 
1 . Polylepidomyia argenteiventris n. sp. 
Head deep brown, dull ochreous in the middle, the sides silvery 
white. Thorax deep brown clothed with bronzy brown scales ; prothoracic 
lobes white. Abdomen black above, unbanded, venter silvery white. Legs 
deep brown unbanded. 
$ . Head (Fig. 15. a) deep brown, with deep brown flat scales with 
ochreous line in the middle and silvery white at the sides ; with some 
upright forked scales at the back and some small pale narrow-curved 
ones. Clypeus bright brown ; palpi and proboscis deep brown. Antennæ 
deep brown, the basal joint paler, pilose, hairs rather long. 
Thorax deep brown with a dense matting of rather large broad 
curved bronzy scales, irregularly disposed ; prothoracic lobes with small 
flat silvery scales; scutellum (Fig. 15. b) testaceous with flat violet brown 
scales and with four large and two small (central) bristles to the mid 
