COLYPHUS. 14] 
COLYPHUS. 
Colyphus, Spinola, Mon. i. p. 1338. 
Derestenus, Chevr. Mag. Zool. 1843, p. 13. 
Distinguished from the allied genera which follow by having the antenne serrate, 
without any distinct club. Certain genera seem very plastic and to lend themselves 
readily to mimicry; this is the case here, rendering the species hard to discriminate, 
from the excessive variability of one or two of them. It will be noticed below that 
the species named and figured by Spinola probably belong to one or two types. I have 
not yet seen any from a more southern country than Colombia. 
Section A. Antenne serrate, the two subapical joints not wider than those preceding them. 
1. Colyphus ventralis, (Tab. VII. fig. 18.) 
Ater, breviter sat dense pubescens, capite rufo, occipite nigro-lineato; prothoracis lateribus rufis, antice flavis ; 
femoribus apice, segmentis ventralibus duobus penultimis totis, secundo et tertio ad marginem tantum 
rufis. Long. 9-11 millim. 
Hab. Muxico, Jalapa (Hoge); GuateMata, Duefias, San Gerdénimo (Champion). 
Var. Elytrorum sutura margineque laterali pallidis. 
Hab. Mexico, Oaxaca (Hoge). 
The puncturing of the whole upper surface, but especially of the elytra, is remarkably 
close and intricate in the species of this genus; and they are wholly devoid of the 
shortened and deeply-impressed striz so usual in the Cleride; this, together with the 
colour, gives this insect a singularly close resemblance to some Lampyride, which the 
two or three pale segments beneath heightens. The variety from Oaxaca equally 
resembles those varieties of species of Photinus in which the margins are pale. 
2. Colyphus quadrilineatus. (Tab. VII. figg. 20, 21.) 
Derestenus quadrilineatus, Chevr. Mag. Zool. 1843, p. 14, t. 108°; Lacordaire, Gen. Atlas, t. 46. 
fig. 2°. . 
Derestenus similis, Thoms. Mus. Scient. p. 57° (sec. Sallé). 
Derestenus orthopleuridus, Thoms. loc. cit. (Sallé coll. partim). 
Hab. Mexico!?%, Cosamaloapam, Tuxtla, Playa Vicente, Vera Cruz (Saillé); Cerro 
de Plumas, Jalapa (Hége); Guatemaa, Chacoj, Teleman (Champion). 
The figure 20 in our Plate is taken from a specimen from Vera Cruz; and fig. 21 is 
a variety with the lateral margins concolorus, and very faint vitte near the suture, 
standing under the name orthopleuridus, Thoms., in the Sallé collection. 
Allied to the last in the slightly expanded elytra; the fourth and fifth ventral plates 
and the margin of one or two preceding are pale yellow. The femora are annulated 
with dusky. 
