MALACODERMATA. 257 
of that genus. The occurrence of specimens with the whole of the three apical plates 
pale does not assist us here, for I cannot recognize in either of these forms any sexual 
difference in the head, antenne, or form of the ventral plates; these are of the male 
type, such as exist in Z. vitricollis. This species and the following one have a general 
resemblance to the genus Alecton. The reference to Luctdota must therefore only be 
considered a provisional one, till the generic characters have been better elucidated. 
21. Lucidota complanata. 
Oblonga, parum ovata, nigro-fusca; prothorace subtriangulari, antice rotundato, sordide ochraceo, disco nigro- 
vittato, utrinque haud conspicue miniato, obsolete carinato; elytris margine explanato ab humeris, pone 
medium late pallidis. Long. 9-10 millim. 6. 
Mas. Segmentis tribus apicalibus ventralibus utrinque albido-maculatis. 
Hab. Panama, Volcan de Chiriqui, Bugaba ( Champion). 
The characters of this species are the same as those of the last, excepting the colour 
of the thorax and elytra, and of the whole underside of the body, these being of a 
dark fuscous-black, with only the parts named in the diagnosis pale. The antennz 
are compressed, scarcely serrate, widest in the middle, reaching rather behind the 
posterior coxee. The apical ventral spots are in some cases visible on the three last 
segments, in others only on the fifth and seventh; and in some specimens the three 
segments are wholly pale, as in L. chiriquiana. Met with commonly by Mr. Champion 
in the hot low country at Bugaba, less frequently at from 2000 to 6000 feet altitude ; 
it is, he observes, frequently found sitting on leaves in the forest in early morning, and 
not seldom seen on the wing. 
22. Lucidota fenestrata. 
Oblonga, parum ovata, fusca; prothorace elytrorumque margine laterali et apicali sordide albis, prothoracis 
disco miniato vix ad basin infuscato, lateribus antice angustatis fronte subdiaphano; antennis serratis. 
Long. 9 millim. <6. 
Mas. Segmentis quinto et sexto macula transversa in medio alba nitidissima, nigrocincta; oculis sat magnis, 
Hab. Panama, Volcan de Chiriqui (Champion). 
This species will perhaps be best recognized by my comparing it to very small 
Cratomorphus, with which genus, indeed, I should be inclined to incorporate it, if it 
were not that the antenne are longer and more serrate than to render that course 
necessary, and because the apical segments are in form the same as those of the three 
species just described. The luminous parts are, however, different, being two trans- 
verse areze on the fifth and sixth ventral plates, just such as are seen in some true 
Cratomorphi, e.g. C. ovatus. The thorax is pale, slightly diaphanous in front, 
narrowed from its base, but neatly rounded in front. The elytra are fuscous, or pale 
leaden black, with the entire lateral margin pale, this pale margin returning a little 
up the suture at its apex. I have only detected two examples among the Lampyride 
BIOL. CENTR.-AMER., Coleopt., Vol. III. Pt. 2, October 1884. oL 
