MALACODERMATA., 255 
very luminous species. Mr. Champion met with this insect by sweeping Bam busacez 
in the virgin forest in the daytime, and only at 8000 feet elevation. 
It is probable that the species of glow-worms which are most luminous are not 
generally to be found at large in the daytime; Mr. Champion’s observations bear me 
out in this. 
16. Lucidota tincta. 
Nigro-fusca; elytrorum lateribus in medio, prothoracis margine antico et laterali, et antennarum articulis 
duobus apicalibus albidis; prothoracis disco miniato nigro-vittato, vitta ad basin cum macula parva 
conjuncta. Long. 8-9 millim. 6. 
Hab. Panama, Volcan de Chiriqui (Champion). 
Very closely allied to L. apicicornis and perhaps a local form of that species. It 
differs, however, in uniformly having a thorax which is proportionally much smaller, 
with the black vitta and base more distinct. The underside is dark, with the legs pale 
at their bases, and the apex pale in an undefined manner. 
17. Lucidota sinuatocollis. 
Nigro-fumosa, opaca ; prothorace albido, disco roseo parum distincte fusco-vittato, lateribus sinuatis antice 
angustatis, fronte producto ; antennis corporis fere longitudine, compressis, leviter serratis, articulis duobus 
apicalibus albis. Long. 8 millim. o. 
Mas. Segmento subapicali utrinque albido. 
Hab. Panama, Volcan de Chiriqui, 2000 to 4000 feet ( Champion). 
This species has a good deal of resemblance to L. tincta, but more nearly still to 
Photinus edus. It is, however, perfectly distinct from either, and will soon be recog- 
nized if the following points are attended to, viz. the two apical, or half the last but 
one, and the apical joint of the antenne only are white. ‘The thorax is pinkish red, 
not shining nor channelled, and of an ogival form; the sides contract a little before the 
base, the hind angles are acute, a little produced backwards. ‘The luminous parts are 
only two very small spots on each side of the subapical segment: the latter character 
alone will separate it from the two species mentioned. But in this character it is like 
P. armatus and other species. Only three males have been found. 
18. Lucidota difformis. 
Oblongo-subovata, nigra; prothorace, ore, palpis, meso- et metasternis, pedibus basi, elytrisque dimidio basali 
indeterminate flavis; antennarum articulis duobus apicalibus albidis; segmentis duobus ventralibus 
pallide flavis. Long. 9 millim. 6. 
Femina. Antennis articulis duobus ultimis cum precedenti (basi preetermissa) albidis, elytris totis ochraceis. 
Long. 10-11 millim. 
Hab. Panama, Volcan de Chiriqui, Bugaba (Champion). 
If I am correct in uniting these two forms as the male and female of one species, it 
is the first case that has come under my notice among the Lampyride of the sexes being 
differently coloured ; the difference, however, is only that of the elimination of the in- 
