40) MALACODERMATA. 
be seen on the centre, while at other times it is even, or shows a circular depression. 
The elytra are opaque, the discoidal nervure visible, the expanded margin and usually 
the apical quarter testaceous; the discoidal portion is fuscous or smoky black, and 
ends somewhat indefinitely, sometimes leaving only the apical margin and part of the 
suture pale. In the male the margins of the fifth and sixth, the seventh and apical 
segments, and apex of the pygidium are pale yellow. In the female the apex alone is 
diaphanous. 
I have adopted the MS. name attached to a specimen of this species from Sturm’s 
collection. 
5. Photinus ovatus. (Tab. IV. fig. 16.) 
Nigro-fumosus; prothorace subnitido, lateribus late elytrisque triente basali testaceis, his subcostatis. 
Long. 13 millim. ¢. 
Mas segmentis ventralibus septimo et apicali pallidis, pygidio fusco. 
Hab. Mexico, Juquila (Sallé). 
Nearly related to P. nigridorsis, but differing so far in coloration that I do not think 
it can be considered a mere variety. The disk of the thorax is rather distinctly 
channelled, the black central vitta is bordered with red on each side in the middle, 
which colour may be seen on the prosternal surface above the front coxe. The 
pygidium is not pale. 
A single specimen only has come under my notice. 
6. Photinus perelegans. (Tab. III. fig. 12.) 
Photinus perelegans, Gorh. Trans. Ent. Soc. 1880, p. 31. 
Hab. British Honpuras, river Sarstoon (Blancaneaur); Guatemaua, Calderas 
(Champion).—ANTIGUA. 
The figure is of a male from Calderas. 
This species is the first of a series pertaining to Motschulsky’s genus Macrolampis, 
which agree in having the fifth and sixth ventral plates longer than those preceding 
them and clear ivory-white or yellow, with a lateral impression on each, somewhat like 
breathing stigmata (the true stigmata being of course hidden in the folded membrane 
connecting the dorsal and ventral plates). The females have a portion of the abdomen 
luminous, usually the centre of the fifth segment, but are obviously less brilliant than 
the males. In some cases they also have the elytra abbreviated. I have only as yet 
observed this in two species (J. longipennis, Mots., and M. extensus, Gorh.). The female 
of P. perelegans has the fifth segment broadly whitish yellow, with fuscous spots on each 
side of its base, the sixth and seventh plates being fuscous. 
Small examples are a little like P. cinctellus, but are always much narrower, and the 
thorax is particularly elongate. 
