Rey. H. Clark on the Halticidee of South America. 391 
Oxygonus violaceipenns. 
O. rufus, punctatus, elytris nigris vel violaceo-nigris: caput inter oculos 
transverse foveolatum, nitidum, rufo-flavum: thorax impunctatus, 
rufus: scutellum triangulare impunctatum: elytra leviter punctata, 
violaceo-nigra marginibus tenuiter rufis: pedes (tibiis nigris) et corpus 
subtus rufo-ferruginei: antenne rufo-fusce, art, 1-3 flavo-rufis. 
Long. corp. lin. 33,-Jat. lin. 13. 
Brazil. 
Oxygonus interruptus. 
O. oblongus, parallelus, punctatus, niger, prothorace elytrorum maculis 
corpore subtus et pedibus flavo-rufis : caput inter oculos leviter trans- 
verse depressum, flavum, basi ad medium nigro-fusca: thorax impunc- 
tatus, flavus: scutellum triangulare, impunctatum, flavum: elytra 
leviter punctata, nigra, vittis utrinque duabus interruptis et macula 
insulata versus apicem flavis; vittee inzequales longitudinaliter dis- 
posite insulate, macula brevis versus apicem haud suturam attinet: 
corpus subtus flavum: pedes flavi; tibie et tarsi nigra: antenne in 
exemplo unico, eheu ! desunt. 
Long. corp. lin, 3, lat. lin. 13. 
O. interruptus is remarkable by the singular pattern of its elytra. 
On either side two irregularly formed and uneven flavous longi- 
tudinal markings occupy the apical portion, touching neither the 
suture, the base, nor the margin ; near the apex is another shorter 
and insulated marking. 
I have a single example from Cayenne, from the collection of M. 
Thomson, 
Oxygonus exornatus. 
O. parallelus, punctatus, niger, prothorace, antennarum basi, fascia media 
lata et marginibus elytrorum rufo-flavis: caput super antennarum bases 
transverse foveolatum, impunctatum, leve, rufo-flavum: thorax basi 
sed haud margine anteriore marginato, impunctatus, nitidus: scautellum 
impunctatum, flavum : elytra parallela, satis depressa, leviter punctata, 
nigra, fascia media lata et marginibus (tenuiter) rufis: corpus subtus 
nigrum: pedes nigri, anticis rufis: antenne nigro-fusce, art. 1 et 2 
flavis. 
Long. corp. lin, 33, lat. lin. 14. 
O. exornatus approaches O. succinctus, but is in form decidedly nar- 
rower, and wants the medial frontal fovea of this latter species ; the 
coloration also is different. 
I possess an example from Brazil, from the collection of the Marquis 
La Ferté. 
Oxygonus succinctus, Dej. Cat. 
O. parallelus, robustus, rufus, elytrorum basi late et plaga utrinque maxima 
apicali nigris: caput super antennarum bases utrinque oblique foveo- 
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