32 Mr. G. R. Waterhouse on Coleopterous Insects 
produced laterally into small acute processes ; the ordinary inter- 
stices of the strie of the elytra are very narrow and elevated ; the 
punctures of the stric are large, transverse, and separated from 
each other by narrow spaces. A few large punctures are seen on 
the under surface of each of the thoracie segments ; the abdominal 
segments are more thickly punctured ; the penultimate however 
is mearly smooth, and the last is very delicately punctured. The 
abdomen is depressed in the middle. 
Two specimens from James’ Island present the above charac- 
ters; some other specimens in the collection which cannot other- 
wise be separated, display the thoracic fovea rather less distinctly, 
and the double ridge on the disc is sometimes wanting. 
Ammophorus obscurus. Amm. ater, obscurus ; antennis pedibusque 
piceis ; capite thoraceque rugoso-punctatis ; angulis thoracis acutis 
extrorsum productis ; elytris crenato-striatis, interstitiis angustis 
elevatis.—Long. corp. 25 lin. 
This species has the thorax narrower than in either of the pre- 
ceding, from which it may moreover be distinguished by its dull 
colour, the thorax being rugosely punctured: the sculpture of the 
elytra is rather more decided, and the suture is not raised as in 
the other species. In Amm. galapagoensis the suture is fully as 
much raised as the ridged interspaces of the striz ; in Amm. bi- 
foveatus the suture is also distinctly raised, but not quite so much 
as the ridges between the striz ; in the present species the suture 
is flat. Like Amm. bifoveatus, the angles of the thorax are pro- 
duced, and as in both the preceding species ; the humeral angle of 
the elytra is produced and acute. The ordinary interstices of the 
elytra form very narrow and considerably elevated ridges, mn the 
grooves between which are large transverse impressions, and si- 
milar impressions are observed on each side of the suture; not 
extending quite to the suture, they give that part the appearance 
of being slightly raised, and indeed it is so on the hinder part 
of the elytra. 
The three species of Ammophorus here described have the third 
joint of the antennz shorter in proportion than in Amm. peru- 
vianus, but they agree in this respect with Amm. costatus and 
Amm. rubripes of Solier, with which they also agree in size ; they 
all have the interstices of all the striz of the elytra elevated, 
whilst in one only of the Chilian species (A. costatus) are any of 
these interstices distinctly ridged, and here it is only the alter- 
nate spaces between the striz which present that condition. 
Pamily Pepinipa. 
Pedoneces*, nov. gen. 
Clypeus distinctly emarginated. 
Labrum small, transverse. 
* From xdov, the ground, and aixéw, to inhabit. 
