180 [ November, 
LOXANDRUS GRAVESCENS, 1. sp.—Robustior, oblongus, postice ob- 
tusus, piceo-niger, nitidus, leviter iridescens (9 elytris sericeo-opacts), 
antennis, labro, palpis pedibusque rufis ; thorace transverso, antice rotun- 
dato, postice prope basin sinuatim angustato, angulis posticis, rectis, supra 
medio basi parce punctato, fovea lata utringue profunda; elytris striatis, 
striis subtiliter punctatis ; corpore subtus sericeo, impunctato. 
Long. 33—A4d lin. 8 9. 
A species of somewhat heavier “build,” especially in the larger 
individuals, than usual in this genus; with rather shorter and stronger 
legs and broadly rounded apex. The anterior angles of the thorax are 
also blunt and deflexed, giving a more obtuse appearance to that 
segment. 
Banks of R. Tapajos. 
LoxaNDRUS SUBPARALLELUS, n. sp.— Elongato-oblongus, niger, 
politus, leviter iridescens, antennis, palpis tarsisque fulvo-rufis, antennarum 
articulis 3—4 nigro-maculatis; thorace antice late dilatato-rotundato, | 
postice angustato, angulis posticis rectis ; toto bast sparsim grosse punc- 
tato ; elytris striatis, striis subtiliter punctulatis ; corpore subtus piceo- 
sericeo, impunctato. Long. 5 lin. 8. 
The thorax anteriorly is not much narrower than the elytra. 
St. Paulo, Amazons. 
LoXaNDRUS RUBESCENS, n. sp.— Oblongo-ovatus, lete tridescens, 
rufus, capite supra et elytris (sutura marginibusque exceptis) piceo-nigris, 
antennis (basi flavo excepto) fuscis, palpis pedibusque flavis ; thorace 
guadrato, postice paululum angustato, angulis posticis prominulis, supra 
medio basi grosse pauciter punctato, fovea lata profunda ; elytris profunde 
striatis, striarum fundis subtilissime punctulatis ; metasterno grosse 
sparsim punctato. Long. 24—8% lin. 
Upper Amazons. 
LoxaNnDRUS PICTICAUDA, n. sp.—Oblongo-ovatus, leviter iridescens, 
piceus, antennarum basi, palpis pedibusque flavo-testaceis ; elylris margine 
lato apicali maculaque parva suturali propinqua, flavo-testaceis, interdum 
nigro-marginatis ; thorace quadrato, interdum sanguineo, postice paululum 
sinuato-angustato, bast punctulato, fovea utringue angusta profunda ; 
elytris punctato-striatis ; episternis impunctatis. Long. 2% lin. g 2. 
R. Tapajos. 
LoxXaNDRUS RUFOSTIGMA, n. sp.— Oblongqus, niger, leviter tridescens, 
