iy? 
Usb s4 
Uswly 
152 HETEROMERA. 
very finely punctured, and sometimes with traces of one or two raised lines on the disc; beneath closely 
and finely punctured, pallid testaceous, the last three ventral segments often darker ; legs testaceous, the 
claws feebly dilated at the base. 
3. Posterior femora strongly incrassate (not quite so stout in one example); the posterior tibiw a little 
curved. 
Length 7-9 millim. (¢ 9.) 
Hab. Guatemaa, San José (Champion); Panama, near the city (Champion). 
Four male and two female examples, all from the Pacific coast; one only from 
Panama. This insect was found in both localities in company with O. litoralis. It differs 
from the latter in the finer punctuation of the head, the less close and shallower 
punctuation of the thorax, and the differently marked elytra; the claws are only feebly 
dilated at the base, and the posterior femora in the male are much thickened. From 
O. femoralis, the much coarser and sparser punctuation of the head and thorax and the 
less closely punctured elytra sufficiently distinguish it; the male of the present species 
has the inner apical angle of the hind tibie armed with a very short tooth. 
( arexee: e} 
3. Oxacis lucana. 
Probosca lucana, Lec. New Species Col. p. 167°. 
Hab. NortH America, Cape San Lucas, Lower California !.—Mexico, Tres Marias Is. 
(Forrer). 
A single female example received from the Tres Marias Is. agrees exactly with one 
of the same sex from Cape San Lucas forwarded to us by Dr. Horn. The species 
appears to be confined to the sea-shore. 
* 
Allovecrs 
4. Oxacis holosericea. (Tab. VII. fig. 9.) 
Elongate, opaque, densely clothed with very fine silky cinereous pubescence; testaceous or pallid testaceous, 
the prothorax with the sides rather broadly and a median stripe (the latter somewhat interrupted at the 
middle), and the elytra with two broad vitte which are confluent just before the apex (leaving only the’ 
suture, the lateral margin, and a discoidal stripe of the pallid ground-colour, the discoidal stripe indistinct 
in one example), brownish or piceous. Head very closely and finely punctured, the eyes and the tips of 
the mandibles black; antenne testaceous, the basal joints sometimes slightiy stained with piceous, the 
eleventh joint constricted at the middle in both sexes ; prothorax longer than broad, convex, the sides a 
little rounded in front and gradually converging behind, the disc longitudinally depressed in ‘the centre 
before the base (canaliculate in the middle in one example) and with a very shallow indistinct depression 
on either side anteriorly, the surface densely and minutely punctured; elytra subparallel, punctured like the 
prothorax, and without distinct raised lines ; beneath densely and minutely punctured, pallid testaceous, the 
flanks of the prothorax, the sides of the metasternum, and (sometimes) the sides of the venter stained with 
piceous ; legs testaceous, the knees sometimes a little darker, the femora similar in both sexes, the claws 
very distinctly toothed at the base. 
Length 63-8 millim. (¢ 9.) 
Hab. Mexico, Acapulco (Hége), Tres Marias Is. (forrer). 
One male and two female examples. This species resembles O. Jucana (Lec.), but 
is at once to be distinguished from it and the allied forms by the dense and minute 
