MALACODERMATA. 261 
Mas. Segmentis quinto, sexto et apicalibus albido-flavescentibus. 
Femina. Pectore magis infuscato, segmentis quinto et apicali pallidis, sexto infuscato. 
Hab. Guatemata, Zapote, Cerro Zunil, San Isidro, Las Mercedes (Champion) ; 
Panama, Volcan de Chiriqui, Bugaba (Champion). 
Among the Photini, species which are very pale on their upper surface are at first 
very puzzling and unsatisfactory to deal with, looking as they do like pale or immature 
forms of other species. A very careful study convinces me that in general such forms 
are quite distinct, and that these soft insects dry and mature so quickly that it is very 
rarely they are met with at large immature. The present is the first example of a 
really pale species among the Lampyride in this work, but such species are frequent in 
the hotter parts of the West-India Islands and South America, and it will be recollected 
we have had similarly pale species among the Telephoride. 
This insect is, I think, nearest P. volcanicus, but has the elytra never more than 
slightly infuscate, with narrowly pale margins. The thorax is not longer than it is 
broad at its base. It is not often brightly rosy, but it is very beautifully so in the 
specimens from Bugaba, which I select as the types, and with these a single specimen 
from Zapote agrees. The dark fuscous colour of the abdomen contrasting with the 
white luminous segments proves the specimens mature, as does the condition of the 
genital segments, and the black head. The antenne are scarcely half as long as the 
body ; they are, with the margins only of the tibia and tarsi, fuscous. The wings are 
also (as usual) dark fuscous. About two dozen specimens were sent; the sexes 
being nearly equal in number. In all Photini, unless the contrary is mentioned, the 
eyes of the males are larger than those of the females, a character which will often 
assist one in separating them from Lucidotw, in which genus they are nearly equal. 
10 (a). Photinus radians. 
Oblongo-elongatus, parallelus, nigro-fuscus; prothorace pallido, disco late nigro-vittato (vitta proper basin 
transversim dilatata) utrinque miniato, medio obsolete canaliculato, antice tenuissime carinato; elytris 
prunneis, disco late infuscatis, vel nigro-fuscis, sutura margineque laterali et apicali brunneis. Long. 
14-15 millim. ¢Q. 
Mas. Segmentis quarto ad apicem, quinto et sexto totis albis eburneis, pygidio fusco. 
Femina. Segmento quarto ad apicem, quinto in medio albis, sexto et apicali fuscis. 
Hab. Panama, Volcan de Chiriqui, Bugaba (Champion). 
Of the size and form of the species recorded in the present work as P. consanguineus, 
and, like it and P. cinctellus, margined round the entire edge of the elytra, except at 
the base, but of a rich chocolate brown colour, and with this colour often widened at 
the basal half of the suture, and expanding till it meets the marginal brown, thus 
leaving only the bases and a portion near the apex indistinctly infuscate. The antennz 
are shortish, not reaching behind the posterior coxe. I do not mention the form of 
the ventral segments because these are normal, and have been already described by me; 
