of the Amazon Valley. 309 



Long. 2j lin. 



Closely allied in form and colours to an undescribed 

 species from Texas. The pale brown fasciee of the elytra 

 form very slender lines, the second fascia is arcuate 

 towards the base, the third towards the apex, so that the 

 two together form a large ring on the apical half of the 

 two elytra. The abdominal segments in the $ are dis- 

 torted in a similar way to the European types of the 

 genus. 



Hah. — Santarem, Amazons. 



Genus Arjiotis. 



Bates, Entom. Monthly Mag. iv. 26 (1867) j Lacord. 

 Gen. viii. 398. 



(Charac. emend.) . Corpus lineare, tenue. Caput supra 

 inter antennas planum, ultra oculos paulo prolongatum, 

 attenuatum ; oculi distantes ; palpi breves, apice truncati ; 

 antennae {<^) corpore dimidio longiores, tenues, fili- 

 formes, breviter sparsim setosae, articulo basali elongate, 

 leviter incrassato, articulis 3-11 longitudine subasquali- 

 bus, simplicibus. Thorax angustus, elongatus, medio paulo 

 dilatatus, lateribus subtuberculatus. Elytra linearia, plana, 

 apice rotundata. Pedes elongati, graciles ; femora abrupte 

 clavata, postica longe ultra apicem elytrorum extensa. 

 CoxEe anticee globulosae, exsertae. Acetabula intermedia 

 extus aperta, mesosterni epimera angusta. Abdominis 

 segmenta $ normalia, prime magis elongato. 



This genus, the position of which Lacordaire considered 

 doubtful, appears to belong to the group Obriinw, with 

 the species of which it also agrees in facies. 



1. Arceotis fragilis, Bates, I, c. 



Flavo-testacea, opaca, supra nuda, articulis antennarum 

 apice fuscis; capite thoraceque creberrime punctulatis ; 

 elytris alutaceis et passim punctatis; pedibus breviter 

 setosis. 



Long. 2| lin. S. 



Hah. — River Tapajos. 



TRANS. ENT. SOC. 1870. PART III. (AUGUST.) Z 



