42 MALACODERMATA, 
generic name Macrolampis. These species have the males with two ventral plates 
(the fifth and sixth) very long and diaphanous, and are evidently highly luminous. 
The females are heavy insects with short elytra, and, I conceive, are no less luminous 
than their males. 
The present species has the head fuscous, with large, prominent eyes; the antenne 
are not perfect in any of the three specimens before me; but sufficient remains to show 
them to be filiform and of moderate length. 
The thorax is of a form unusual in this genus, having the hind angles a little turned 
out; this and its totally red colour will amply distinguish it from P. extensus. 
10. Photinus consanguineus. (Tab. IV. fig. 25, 2.) 
Oblongus, subparallelus, flavo-testaceus, capite, antennis, palpis, pectore ex parte, tibiis, abdominis basi et elytris 
nigro-fuscis, his sutura margineque testaceis; thoracis disco miniato, macula parum distincta picea. 
Long. 13-14 millim. ¢ 9. 
Mas abdominis segmentis ventralibus quarto ad apicem, quinto, sexto septimo et apice pallide flavis. 
Femina segmento sexto partim, apicali toto infuscato. 
Hab. Mexico, Tuxtla (Saillé). 
_ This species agrees very closely with specimens in my collection from Norris bearing 
the above name ; and it may be assumed to be the P. consanguineus of Dejean’s Catalogue. 
I have not been able to see an authentic specimen of Leconte’s species of the same 
name ; and as there are several allied species, I cannot feel sure that it will prove to be 
the same. It is rather larger and more parallel than the species here referred to as 
cinctellus, and has the thorax much less distinctly marked with pitchy; in one example 
at least the spot is quite absent. From the species referred to by me as pyralis, Linn. 
(Trans. Ent. Soc. 1880, p. 23), it differs in being smaller, with a less distinct thoracic 
spot. 
The section to which it belongs presents the greatest difficulties, both in separating 
the species and in their identification with the Linnean and Fabrician types. 
11. Photinus cinctellus, (Tab. IV. figg. 232, 242.) 
Photinus cinctellus (Chev. MS.*), Gorh. Trans. Ent. Soc. 1880, p. 24°. 
Hab. Mexico!, Cordova, Tuxtla, Panistlahuca (Sallé); GuaTEMALA, Zapote 2, Chacoj 
department of Vera Paz (Champion); Nicaragua, Chontales (Belt); Costa Rica, Volcan 
de Irazu (Rogers). 
12. Photinus simplex. 
Fumeo-niger, oblongo-ovatus, prothorace flavo, disco nigro nitido utrinque miniato, elytris fumosis conco- 
loribus, femoribus et coxis pallidis, abdominis segmento quinto albo, sexto etiam interdum albescente. 
Long. 11 millim. 9°. 
Hab. Muxico, Parada (Sallé); Guaremata, Chacoj (Champion). 
Another species of the cinctellus group, and very closely allied to that species and to 
