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Since described by Grermar under the name of vittatus, 
Spec. Nov. 
G. analis^ Say. Trans. Amer. Philos. Soc. Germar 
is of opinion that this is the same as natator, F. ; but on 
comparison;i I find it to differ in many small characters^ the 
most obvious one of which is the colour of the epipleura, that 
of the natator being light piceous whilst in the analis it is of 
a bronzed-black, &c. It is no doubt a closely allied species. 
3. G. obtusiis^ Black; feet honey- yellow ; behind ob- 
tuse. 
Inhab. Mexico. 
Sody black, polished : head with two indented dots be- 
tween the eyes : mouth piceous : antennae piceous-black : 
thorax with the anterior lateral, posterior lateral and medi- 
al impressed lines very distinct : elytra obtuse behind and 
widely truncate ; near the tip obviously depressed ; punc- 
tures well impressed, in regular series, the intervals not im- 
pressed : beneath dark piceous, somewhat paler on the edg- 
es of the segments: feet and tip of the venter honey-yel- 
low. 
Length over one-fifth of an inch. 
It may be distinguished from the analis and limbatus. 
Nob. and from ih& natatory Fabr. and marinus, Gyl. in be- 
ing more obtuse behind and the consequent greater trunca- 
tion of the elytra. 
4. G. parcusy Black ; feet honey-yellow. 
Inhab. Mexico. 
Body rather robust, black, highly polished : head with 
two indented, oblique lines between and before the eyes : 
thorax with the impressed lines very obvious : elytra with 
very distinct, well impressed series of punctures, the inter- 
vals not at all impressed ; tips obtusely rounded : feet ho- 
ney yellow. 
Length nearly one-fifth of an inch. 
In comparison with mzwwfws, Fabr. this species is a little 
longer and much more robust, more highly polished and the 
impressed lines of the thorax and dots of the elytra are 
more profound and distinct. It is somewhat smaller than 
either of those I have before described, and the punctures of 
the elytra are, notwithstanding, larger. 
