Mr. H. W. Bates’s Notes on Longicorn Coleoptera. 203 
Rio Janeiro, Novo Friburgo. 
A species remarkable for the sexual differences in the head, 
thorax, and antenne. 
The male agrees in many respects with the genus Jsomerida, 
whilst the female has the characters of Amphionycha ; the an- 
tenne: of the male, however, are sparsely ciliated, and not 
furnished with tufted pencils of hair as inLsomerida. 'The whole 
insect is deep black, except a streak under each eye and on the 
epistome, and a large oblong spot on each elytron, which are 
hoary white. 
Amphionycha fuscipennis. 
Cylindrico-oblonga, flayo-testacea (abdomine metasternoque inter- 
dum fuscis), capite antennisque nigris,elytris piceo-fuscis, tenuiter 
pubescentibus, thorace tomento compacto flavescente tecto: capite 
(cum oculis) quam thorax utroque sexu vix latiore, inter an- 
tennas concavo, fronteconvexa ; thorace medio utrinque prominulo, 
antice leviter angustato, postice subconstricto ; elytris convexis, 
ante apicem subito declivibus, apice late subtruncato-rotundatis, 
dorso seriatim punctulatis, carina laterali subrecta, longe ante 
apicem terminata; antennis nigris; pedibus nigris, femoribus 
(apice exceptis) flavis. 
Long. 5-6 lin. ¢ Q. 
Yungas of La Paz, Bolivia (Buckley) ; Chanchamayo, Peru 
(Dr. Thamm). 
The Peruvian specimens have the under surface of the body 
wholly pallid; in one from Bolivia the abdomen and sides of 
the metathorax are blackish. The Bolivian specimens are 
5 lines long, that from Peru 6. 
Amphionycha fulvicornis. 
Modice elongata, nigra, antennis melleo-fulvis, scapo apice, articu- 
lisque secundo et apicalibus fuscis ; thorace vitta (antice dilatata) 
laterali alba: capite 2 magno, occipite valde convexo; g nor- 
mali, inter antennas concayo ; thorace basi valde constricto, disco 
nitido; elytris apice rotundatis, supra crebre punctatis; carina 
laterali recta, apicem fere attingente; antennis utroquesexu corpore 
paullo longioribus, sparsim ciliatis, articulo tertio quam quartus 
3 paullo, 2 multo longiore. 
Long. 44-5 lin. ¢ Q. 
Rio Janeiro, Novo Friburgo. 
In structure similar to A. fenestrata, and agreeing with that 
species in the sexual differences as to the size of the head and 
the length of the third antennal joint. In colours it is totally 
different. 
Amphionycha discicollis. 
Robusta, rufo-testacea, vertice utrinque post oculum elytrisque 
(sutura et apice exceptis) fusco-nigris, griseo tenuiter pubescenti- 
14* 
