330 NITIDULIDA. 
form, but Mr. Champion obtained two specimens of the typical form at San Gerdnimo. 
The series sent by Gaumer from Temax constitutes a variety intermediate between the 
typical form and the var. 6. Besides the variation in colour, there is very great 
difference in size; in the contracted condition the largest examples are about five, 
the smallest about three, millimetres in length. 
7. Camptodes gaumeri, sp.n. (Tab. X. figg. 21,9; 21a, labrum and man- 
dibles.) 
Rotundatus, convexus, sat nitidus, rufus, capite elytrisque nigricantibus, his vix submetallescentibus, prothorace 
scutelloque quam elytra parum dilutioribus, subleevigatis. 
Long. 5 millim. 
Hab. Mexico, Temax in North Yucatan (Gaumer). 
Antenne sordid yellow, the club infuscate. Head sparingly, moderately coarsely, 
punctured. Thorax ample, transversely very convex, sparingly and extremely finely 
punctured, not altogether shining. Elytra sparingly, somewhat coarsely, punctured, 
with obsolete strize between the punctures. Pygidium fuscous, nearly impunctate. 
Underside and legs red. 
Gaumer procured a very large series of this species; the punctuation in it varies 
very little, and there is no doubt the insect is distinct. It greatly resembles certain 
specimens of var. 8 of C. morio, but may be distinguished by the very obsoletely punc- 
tured thorax and pygidium, and by the fact that the thorax is rather broader in front, 
so that the sides behind are curvate in a somewhat more longitudinal, less oblique, 
direction. There are also traces of the margin on the front of the metasternum being 
present : this cannot be seen in C. morio. 
A ferruginous-yellow variety occurs, due perhaps partly to immaturity. 
8. Camptodes brevis. 
Camptodes brevis, Reitter, Verh. Ver. Briinn, xii. 1, p. 104°. 
Hab. Mexico}, 
I should have no hesitation in assigning one of the varieties (var. «) of C. morio 
to Reitter’s description, were it not that the author says that the fine margin on the 
front of the thorax is broadly interrupted in the middle. I should not be surprised if 
this statement be due to an error of observation, for viewed in certain lights this appears 
to be the case in C. morio and C. gaumeri, though it is not really so. 
9. Camptodes tricolor. 
Camptodes tricolor, Er. in Germ. Zeitschr. iv. p. 826°; Reitter, Verh. Ver. Briinn, xii. 1, p. 103. 
Hab. Mexico, Oaxaca (Deppe '). 
I see nothing in the description that would not apply to a specimen of C. morio 
