PHOTINUS. AT 
Very like P. exstinctus, and, like it, apparently incapable of emitting light; this, 
however, can hardly be determined from dead examples only. It may be distinguished 
from it by being wider and less linear. 
26. Photinus affinis. 
Photinus affinis, Gorh. Trans. Ent. Soc. 1880, p. 28. 
Hab. Muxico, Capulalpam (Sai/é) ; Guarumata, Calderas, Capetillo (Champion). 
27. Photinus plumbeus. 
Photinus plumbeus, Gorh. loc. cit. p. 29. 
Hab. Guatemata, Zapote (Champion). 
Very nearly allied to both fumigatus and affinis; smaller, with the elytra of a more 
leaden black, and with the abdomen almost entirely white. | 
28. Photinus pulchellus. 
Photinus pulchellus, Gorh. loc. cit. p. 29°. 
Hab. Guatemata, Zapote 1 (Champion); Nicaraeua, Chontales (Janson). 
The Chontales specimens differ a little from the type; they are less brightly coloured, 
and in the male the fifth and sixth segments are eburated, yellowish; the fourth plate 
(much shorter than these) is also whitish. 
29. Photinus concinnus. 
Photinus concinnus, Gorh. loc. cit. p. 30°. 
Hab. Guatemaua, Zapote }, Vera Paz (Champion) ; Nicaragua, Chontales (Janson). 
Very nearly allied to pulchellus, smaller and more slightly built, and with the suture 
scarcely paler. | 
30. Photinus parvulus. 
Griseo-niger, prothoracis margine albo, disco nigro, levi, abdominis apice albescente. Long. 43-5 millim. g 9. 
Hab. Guatemata, Zapote (Champion). 
Var. a. Prothoracis disco nigro-vittato utrinque maculata miniata. 
Hab. Mexico, Cordova (Sallé). 
Var. 6. Prothorace magis elongato, disco fusco utrinque miniato, elytrorum sutura et margine tenuissime albis. 
Hab. Guaremata, Zapote, San Gerdnimo (Champion). 
This little Photinus, the smallest species of the whole family yet noticed, is certainly 
very near to P. minutus, Say. I observe the following points, however, in which it 
diverges. The thorax is more shining and rather longer in proportion to its width; 
