340 
Appendix . 
over the roots of the wings and forming two distinct lines down 
the mesonotum ; scutellum pale chestnut-brown, with Hat black 
scales (partly denuded); metanotum deep brown in the middle, 
pale ochraceous-brown at the sides; pleurae pale ochraceous. 
Abdomen dark brown, with blackish-brown scales and pearly 
apical spots, showing pale blue at times; venter ochraceous. 
Legs brown, the mid femora swollen, in the hind legs the last 
two and the greater part of the apex of the antepenultimate 
tarsal joints white ; ungues small, equal and simple; in some 
lights the fore and mid tarsi appear pale in colour and rather 
shiny. 
Wings with brown scales, the median ones small and 
truncated, in a single row, a few long thin lateral ones, scales at 
the base of the fifth, and a few at the base of the fourth metallic- 
blue in certain lights ; first sub-marginal cell very small, the 
second long vein close to the first long vein, the stem passing- 
some distance past the supernumerary cross-vein ; second posterior 
cell larger than the first sub-marginal, but small; posterior cross¬ 
vein about its own length distant from the mid cross-vein, close 
to the base of the upper branch of the fifth long vein; halteres 
with an ochraceous stem and fuscous head. 
Length .—-1 • 5 mm. 
Habitat. —St. Lucia. 
Time of capture. —February. 
Observations .—Described from two specimens sent by Dr. 
Low to Dr. Rees. It is a very distinct species, which can be 
easily told by the thoracic ornamentation and the white hind 
tarsi. Dr. Low bred them from larvae taken in a pool at the 
Cemetery, St. Lucia, and mentions that the larva is peculiar. 
TJranotaenia socialis. n. sp. 
Thorax deep chestnut-brown, with a metallic mauve median 
line ending at the bare space in front of the scutellum, a similar 
coloured patch in front of the root of each wing and a small 
median one on the scutellum. Abdomen black, unbanded and 
unspotted, but sometimes showing a pearly apical patch on the 
fifth or sixth segment. Legs blackish, unbanded, but with a 
white knee spot and white speck at the tip of the tibiae. Wings 
with a pale blue tint at the root of the fifth long vein. 
9. Head dark, covered with flat black scales and flat 
metallic-blue ones bordering the eyes in the middle; clypeus 
fawn coloured; palpi brown, very hairy; antennae brown with 
grey bands, basal joint bright testaceous; proboscis black, 
swollen apically. 
Thorax brown, with a yellowish and chestnut tinge, with 
very small bronzy-brown scales, a median row of small flat blue 
