268 SUPPLEMENT. 
is very small compared with the length of the elytra, and has the entire margin as well 
as a narrow vitta black, leaving only two, not regular, spots red. The black parts of the 
thorax are rather rugose ; the antenne are filiform, more than half as long as the body, 
wholly black. The luminous parts appear to be very small, confined to two spots on 
each side of the apical segment. Six specimens agree in these characters. 
80 (a). Photinus pusillus. 
Griseo-niger; prothorace albescente, disco miniato nigro-vittato, basique in medio nigricante ; elytris margine 
laterali concolore ; antennis breviusculis, articulis intermediis oblongo-quadratis haud serratis. Long. 5 
millim. 
Hab. Panama, Bugaba, Volcan de Chiriqui 4000 to 6000 feet (Champion). 
Var. Elytris margine albido. 
Hab. Panama, Bugaba (Champion). 
Approaching very closely to P. parvulus this little species must be separated on 
account of the comparative shortness of the antenne, and the abdomen instead of 
having two or three white segments has only a small pale spot on each side of the apex, 
which is very little distinct, but is a little raised and shining. The antenne have the 
joints relatively much shorter than in P. parvulus, and the thorax has not the disc 
broadly dark, but only with a vitta which narrows from the front towards the base, and 
has there a more or less distinct transverse extension. The legs, mouth, and parts of 
the sterna are often pitchy. The eyes are small in all the specimens I have yet 
examined. Some specimens from the lower elevation of 2000 to 4000 feet are smaller, 
but present no differences upon which I can pronounce them distinct; there are two 
specimens from a higher altitude, 4000 to 6000 feet, still smaller, measuring scarcely 
more than 3 millim., and which have their very small thoraces with a reddish 
spot on each side of the disc, the black vitta being widened in front as well as at the 
base. ‘These may be a distinct species. The two specimens I allude to are, I think, 
the smallest Lampyride I have yet seen. 
30 (s). Photinus minusculus. 
Niger; prothorace albescente, nigro-vittato; antennis leviter serratis, articulis duobus apicalibus albis. Long. 
5 millim. 
Hab. Panama, Volcan de Chiriqui 2000 to 4000 feet (Champion). 
This is obviously a distinct species from P. parvulus or P. pusillus: there being, 
however, only two examples (of which, from their condition, I cannot determine the 
sex), it is not advisable to do more than indicate the existence of the species. From 
P. armatus the much smaller size and concolorous margin of the elytra separate it. 
The legs are whitish, clouded with dark. 
