1905.] OF PHYTOPHAGOUS COLEOPTERA. 44) 
OEDIONYCHIS ILLIGERI, sp. Ni. 
Piceous ; thorax flavous, anterior angles not mucronate ; elytra 
closely punctured, flavous, a transverse band at the base, emar- 
ginate within the shoulders, a narrower band below the middle, 
and a triangular spot near the apex, dark fulvous or piceous. 
Var. The posterior elytral markings joined. 
Length 5-6 millim. 
Of short and ovately rounded shape; the head with some deep 
punctures near the eyes, the vertex piceous, clypeus flavous, eyes 
well separated, frontal tubercles oblique, rather short; antenne 
short, fulvous or black, the third, fourth, and fifth joints equal ; 
thorax strongly transverse, more than twice as broad as long, the 
sides broadly suleate, rounded in front, the anterior angles not 
mucronate but thickened, the surface impunctate, flavous; elytra 
finely and closely punctured, with three transverse dark fulvous 
bands—the first at the base, nearly extending to the middle and 
notched at its anterior margin within the shoulders, the second 
narrower band below the middle and immediately followed by a 
triangular spot; neither of the bands extends to the lateral or 
sutural margins, and they are sometimes tinged with an seneous 
gloss; metatarsus very short, claw-joint strongly swollen. 
Hab. Trinidad. 
I possess four specimens of this species, which is of rather 
small size, and may be known by the shape of the anterior elytral 
band, which in all cases is notched at the base, and by the 
position of the posterior bands, which sometimes form but a 
single broad one. 
OEDIONYCHIS DISSEPTA Erichs. 
This is evidently a very variable species in size as well as in 
the markings of the elytra. EHrichson has described two varieties, 
but I have before me others. In the type the elytra have a 
broad transverse, nearly black band at the base and another one 
near the apex; this latter band is often reduced to an oval spot, 
or may be absent altogether; in another form which I received 
from Marcapata, Peru, together with typical specimens, the 
thorax has two blackish spots at the middle; then there is a 
third variety, in which the bands are very much broader and 
only separated by a very narrow transverse flavous band at the 
middle. No other structural differences are visible, in spite of a 
very careful examination, nor do the male genitalia of these 
varieties show any difference whatever. In all the specimens the 
clypeus, thorax, and the lateral elytral margins remain flavous, 
the punctuation is extremely fine, the sides of the thorax are 
nearly straight and are produced anteriorly into a small tooth. 
O. signifera Baly and O. 5-maculata Jac., likewise from Peru and 
Bolivia, seem to be nothing but other varieties in which the 
elytral markings are reduced to spots; they cannot otherwise be 
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