34 ADEPHAGA. 
as normal though rather small, while the middle pair are much smaller and are simple 
(that is to say, neither of them possesses the angular basal lobe). 
This is another peculiar species for which I can indicate no near ally. 
COPELATUS. 
Copelatus, Er. Gen. Dyt. p. 88 (1832) ; Aubé, Spec. Gén. vi. p. 365; Sharp, Trans. Roy. Dubl. Soe. 
n. 8. li. p. 892. 
This, again, is an extensive genus of fully one hundred species; but it is characteristic 
of the warmer portions of the two hemispheres, and in these has a very wide distribution. 
The species have been grouped by me (loc. supr. cit.) according to the striation of the 
wing-cases. I have included this character in the diagnoses here given of new species ; 
but it may facilitate reference to state that Copelatus laccophilinus and C. biformis 
should be referred to group 1, C. salle@i and C. solitarius to group 4, C. proximus to 
group 5, C. basalis to group 9, C. incognitus to group 10, C. leticulus and C. fragilis to 
group 12. C. biformis, however, above recorded as pertaining to group 1, is a peculiar 
species as regards its striation, as will be perceived on referring to its description. 
1. Copelatus biformis. 
Ovalis, angustulus, nitidus, rufo-testaceus, elytris vage nigro signatis. 
Long. 22, lat. 1,5; lin. 
3. Elytris estriatis. 
Q. Elytris quadristriatis. 
Hab. Muxico, Cordova (Sallé). 
This is a very peculiar species, not only by reason of its system of coloration, but also 
on account of the remarkable sexual discrepancy in the striation of the elytra. The 
wing-cases are pale, with the suture and external margin more or less deeply black; 
and besides this there is a dark transverse subbasal, and another dark postmedial 
fascia; these fascize appear to arise from the more or less complete union of longitudinal 
patches of dark colour developed along the serial punctures or strie. The male has the 
front and middle tarsi moderately dilated, and has the lines of serial punctures distinct, 
near the base becoming so definite as almost to form two strie. The female has some 
very fine sexual sculpture on the lateral portions of the prothorax; and on the wing- 
cases there are four very distinct strie; these strie, though placed on the lines of the 
serial punctures, do not altogether obliterate these. ‘The first stria is twice as far from 
the suture as it is from the second stria; it commences some little distance behind the 
base, and terminates much in front of the apex, at the hind margin of the dark post- 
medial fascia. The second stria is still more abbreviate in front than is the first one; 
but the third commences just behind the base; the fourth stria is finer than the other 
three and shorter. There are traces of a fifth more external stria; and, moreover, 
. 
