TEN NEW FIREFLIES FROM JAMAICA—BUCK 75 
that they are not in contact from about half to apices, which are 
apposed, dull, soft, and turned downward in pinned specimens; vesti- 
ture fine, dense, and black. Head width 0.73 mm. Eye length 0.32 
mm., protruding slightly beyond anterior margin of pronotum. Frons 
width 0.29 mm., medium to dark brown, flat, interocular margins 
parallel to slightly divergent. Maxillary palpi light to medium brown, 
labials a little lighter. Antennae 2.5 mm.; dark brown, with markedly 
conical segments of which the terminal and sometimes subterminal 
ones are light brown; segments 6 to 8 each roughly twice as long as 
wide. Coxae, trochanters, femora, and ventral surface of thorax light 
brown, tibiae and tarsi medium brown; tibiae with a circlet of about 
a dozen short robust spurs on their distal ends and others on their 
outer surfaces (pl. 2, figs. 18, 19); claws medium brown. Tergites 
increasingly darker from light brown (1) to black (pygidium) ; pygid- 
ium broad, ogival, abruptly truncated, with apical margin slightly 
emarginate and about two-thirds the length of the basal margin; 7 and 
pygidium wider than the underlying sternites. Sternites increasingly 
darker from light brown (2) to dark brown (7); 8 white and truncated; 
9 white with very slight posterior darkening; 7 slightly emarginate, 
8 slightly notched at middle of hind margin. Aedeagus (pl. 3, fig. 
24, a-c) wholly white; lateral lobes parallel-sided in apical two-thirds 
and tightly apposed dorsally except where diverging slightly near apex 
to accommodate the laterally compressed apex of the median lobe; 
lateral margins of lateral lobes converging abruptly at apical fifth to 
blunt tips directed posteroventrally ; median lobe cylindrical to apical 
third where it is laterally compressed to blade, which projects dorsally 
between lateral lobes; each lateral lobe armed with a recurved hook 
at apical third on ventral internal margin. 
Type and paratypes.—U.S.N.M. No. 57319. 
Distribution.—Morces Gap (type locality), July 16, 1941, type male 
and five paratype males. 
It is a pleasure to dedicate this attractive species to H. S. Barber, 
of the U. S. Bureau of Entomology and Plant Quarantine. 
PRESBYOLAMPIS, new genus 
This name is proposed for the species below described, the male of 
which differs from all other known Jamaican lampyrids in the dis- 
tinctive structure of its aedeagus, in the fact that both tarsal claws on 
each foot are cleft (neither is cleft in Photinus and Diphotus, one is in 
Photuris), in the shape of the pronotum, and in a number of other 
characters. In the bifurcation of the claws and possibly in its aedeagal 
structure this new form resembles one I collected at Ceiba, Honduras, 
in August 1941. This latter form, Mr. Barber informs me, is probably 
Photuris amoena Gorham, 1880, described from Guatemala. Both 
