Mr. H. W. Bates’s Notes on Longicorn Coleoptera. 197 
cylindrical or at most slightly rounded thorax and high ely- 
tral epipleure surmounted by carine, and antennee in which 
the joints are slender and filiform, sparsely ciliated beneath, 
chiefly along the basal half, and with the third joint conspicu- 
ously longer than the following. The head is retracted 
beneath, often to a remarkable degree, the mouth resting on 
the strongly exserted anterior haunches, and the prosternum 
greatly contracted; but the occipital development varies greatly, 
this part in some species being much elongated and exserted, in 
others retractile nearly up to the eyes within the thorax. The 
relative volume of the head is often a sexual character, the 
head in the male being small or normal, triangularly de- 
pressed between the antennee, and in the female enlarged and 
gibbous, with plane and elongated forehead and much elon- 
gated mandibles. The species in many cases admit of com- 
bination in natural groups, which I have indicated in the 
catalogue at the end of this paper. 
Amphionycha charis. 
Breviter subcylindrica, castaneo-fulva, subtiliter tomentosa, thorace 
vitta utrinque laterali (postice angustata), scutello et elytris 
utrinque maculis quatuor (prima obliqua suturali basin versus, 
secunda discoidali post medium, tertia parva subsuturali posteriore, 
quarta minuta laterali) cretaceis; antennis scapo articulisque 
ceteris apice nigris, pedibus melleo-flavis ; subtus pro- et meso- 
sterno vitta lata laterali abdominisque segmento primo macula 
magna laterali, secundo et tertio maculis parvis, cretaceis: capite 
lato, inter antennas paullo depresso, fronte magna, fere plana ; 
thorace lateribus rectis; elytris apice rotundatis, dorso vix con- 
vexis, basin versus punctulatis, carina laterali flexuosa. 
Long. 6 lin. 9. 
_ Ecuador (Buckley). 
Amphionycha albiventris. 
A, chariti proxime affinis, at differt corpore subtus omnino cretaceo 
ete. Oblongo-cylindrica, castaneo-fulva, tenuiter ochraceo tomen- 
tosa, thoracis lateribus (striga angusta episterni excepta) creta- 
ceis, scutello, elytris maculis utrinque sex (prima parva basali, 
secunda magna suturali basin versus, tertia paullo minore rotun- 
data discoidali post medium, quarta transversa lata fasciiformi 
prope apicem, quinta et sexta marginalibus) cretaceis; antennis 
omnino rufo-castaneis ; pedibus melleo-flavis: capite lato, fusco, 
genibus postice canis, fronte magna fere plana; thorace cylin- 
drico, ante basin paullo constricto; elytris apice rotundatis obtu- 
sissime subtruncatis, carina laterali flexuosa. 
Long. 63 lin. Q. 
Venezuela. 
