TEN NEW FIREFLIES FROM JAMAICA—BUCK 65 
with an indefinite and variable brown discal spot, shining. Scutellum 
and mesonotal plates dark brown. Elytron about 6.2 by 1.3 mm.; 
uniform dark brown to black; margins subparallel to apical fourth, 
thence tapering mainly in lateral margin. Head width 1.2mm. Eye 
length 0.65 mm. Frons width 0.38 mm., black, slightly concave; 
interocular margins very slightly divergent. Maxillary palpi medium 
to dark brown, labial palpi light brown. Antennae 3.1 mm., dark 
brown, segments 6 to 8 each three times as long as wide. Legs and 
ventral surface of thorax dark brown. Claws light to medium brown. 
Tibial spurs short and very difficult to see, distributed usually front 
leg 1, middle leg 2, hind leg 2, but a few individuals apparently have 
only one on the hind tibiae. Tergites 1 to 7 dark brown; pygidium 
white, broad with slight median sagittal ridge, shape variable, hind 
margin more or less bisinuate and with median angle of variable length 
and sharpness, sometimes flanked by less prominent lateral angles. 
Sternites 2, 3, 4, and most of 5 dark brown, the latter with most of 
hind margin white, 6 to 9 white; 6 very slightly, 7 and 8 fairly strongly 
and broadly notched at centers of hind margins. Aedeagus (pl. 2, 
figs. 11, a-c) similar to that of P. evanescens Barber; white; lateral 
lobes parallel-sided in basal third, then tapering rapidly, cylindrical 
and curving evenly nearly to contact at apices, which are slightly 
knobbed and curved slightly posterodorsally ; median lobe moderately 
broad, nearly covered basally (anteriorly) on dorsal surface by the 
internally hollowed overlapping basal regions of the lateral lobes, its 
sclerotized covering light brown dorsally, dark brown and rough lat- 
erally at apex, notched deeply on dorsal surface and reaching only to 
apical fourth of lateral lobes; ventrally the sclerotized shell of the 
median lobe covers only its lateral surfaces and is slightly expanded 
near its base. 
Female.—Fully winged and very similar to male. Pygidium white; 
wider than long, the sides strongly arcuate in basal half, thence straight 
and strongly convergent to the truncate apex; rest of tergites dark 
brown. Photogenic organ in median third of sixth abdominal sternite, 
other sternites colored as in male. 
Type and paratypes.—U.S.N.M. No. 57315. 
Distribution.—Sir Johns Peak (type locality), August 2, 1941, type 
male and ten male and one female paratypes; Trafalgar Gap trail, 
July 21, 1941, 1 male paratype; Catherines Peak, July 28, 1941, 3 male 
_ paratypes; New Haven Gap, August 2, 1941, 1 male paratype; Moss- 
mans Peak, July 30, 1941, 1 male paratype. Known altitude range, 
4,975-5,750 feet. 
Named for C. Bernard Lewis, curator of the Science Museum, 
Institute of Jamaica, in appreciation of his many favors to the expedi- 
tion. 
