334 NITIDULIDA. 
19. Camptodes aberrans, sp.n. (Tab. X. figg. 23,2; 23a, labrum and man- 
dibles.) 
Oblongo-ovalis, minus convexus, sat nitidus, niger, subtiliter punctulatus, pedibus fusco-testaceis ; antennis 
testaceis, clava obscuriore. 
Long. 4-53 millim. 
Hab. Mexico, Durango city, Esperanza (Hége), Etla, Puebla, Guanajuato (Sallé). 
Var. Corpore subtus cum pygidio, toto, vel ex parte, testaceo. 
This species seems to be variable as regards colour and punctuation, possibly to as 
great an extent as C. morio. It bears a considerable resemblance to C. morio, though 
different in form, and it has the apices of the elytra each much less rounded. It 
is, however, essentially distinguished from C. morio by the structure of the mandibles, 
which are stout at the apex, and there emarginate. The punctuation, like the colour, 
varies much, but it is always finer than it is in C. morio, and usually the striation 
on the elytra is more distinct. The pygidium is rather sparingly, moderately finely 
punctate. 
We have received about twenty examples of the species; our figure is taken from a 
female of the dark form found at Durango city by Hoge. 
Subgen. CAMPTODES. » 
| Metasternum but little produced in the middle between the intermediate core, its front 
margin very distinct and continued completely across in a sinuate curve; terminal 
Joint of antenne emarginate or emarginate-truncate at the extremity; sutural 
stria of elytra placed very close to the suture, the sutural interstice impunctate. 
(Species 20-51.) 
Group 1. 
Front coxe less widely separated, the prosternal process very short, rather abruptly wider 
just behind the core ; mesosternum with the carina not broader behind 3; metasternum 
depressed in the middle in front and finely margined. (Species 20-23.) 
The species I place in this group are closely allied, with the exception of C. mela- 
nopterus ; they have the scutellum of peculiar form, the apex being subtruncate and 
only obtusely angulate in the middle, but C. melanopterus differs in this respect. All 
are apparently rare and are variable in colour. The group is the centre of the genus, 
having affinities with the preceding and following groups. The claws are in an inter- 
mediate condition in regard to the size of the lobe at their base. 
20. Camptodes jucundus, sp. v. 
Rotundatus, convexus, nitidior, rufo-testaceus, pectore abdomineque fuscis, prothorace disco, elytrorum 
marginibus, late nigris, 
Long. 4 millim. 
Var, Prothorace elytrisque nigris, illo plus minusve vage rufo-marginato. 
