of the Amazon Valley. 217 



4. Acantfioderes fascialis, White. 



Acanthoderes fascialis, White, Cat. Long. Col. in Brit. Mus. ii. p. 361. 



The external angles of the truncature of the elytra are slightly 

 produced. The fore tibia? (in the $ ) are moderately and gradu- 

 ally dilated. 



Ega. This and the preceding are nearly allied to A. semi- 

 griseus, a Rio- Janeiro species common in collections*. 



5. Acanthoderes minimus, n. sp. 



A. ovalis, nigricans cinereo irroratus, elytris sinuato-truncatis angulis 

 externis acutis. Long. 3^ lin. $ . 



Head and thorax blackish, sprinkled with greyish pile. Tho- 

 rax short, rather narrow, the lateral tubercles not prominent 

 although pointed, punctured on the disk, and with two distinct 

 dorsal tubercles. Elytra with the centro-basal ridge indistinct, 

 granulate-punctate at the base, punctured along the sides to the 

 apex. Body beneath and legs black, sprinkled with grey hairs ; 

 claw-joint of the tarsi testaceous. The fore tibise (in the $ ) are 

 widely, but not abruptly, dilated from the middle. 



Para. 



6. Acanthoderes maculicollis (Dej.), n. sp. 



A. ovalis, tomento variegato vestitus : antennis curtis, articulo tertio 

 maxime elongato apice dilatato, quarto elongato, reliquis abbrevi- 

 atis : thorace tubere laterali obtuso, fulvo-griseo, maculis magnis 

 lateralibus duabus atro-brunneis velutinis : elytris trigonis apicibus 

 sinuato-truncatis, fulvo-griseis, utrinque pone medium macula elon- 

 gata transversa discoidali atro-brunnea, fasciisque duabus macu- 

 laribus, altera ante medium altera subapicali, flavo-griseis. Long. 

 4i lin. 6 $ • 



Head fulvous mixed with grey, and with scattered brown 

 points. Antenna? about as long as the body, first to third joints 

 pitchy, the third black at the tip, the rest pitchy, with their bases 

 testaceous ; the terminal joints are ciliated beneath in the 6 . 



* This species is undescribed ; therefore the following diagnosis will be 

 useful : — 



Acanthoderes semigriseus (Cat. Dej.). 



A. oblongo-ovatus, dimidio anteriore tomento fuliginoso, dimidio posteriore 

 cinereo vestitus. Antennae fuliginosae, articulis ad basin griseis. Thorax 

 fuliginosus grosse punctatus linea dorsali lasvi. Elytra sensim attenuata, 

 apicibus breviter sinuato-truncatis, angulis obtusis, ad basin granulato- 

 punctatis, quarta parte basali fuliginosa coloris margine posteriore retror- 

 sum arcuata, reliquis cinereis utrinque fascia interrupta undulata pone 

 medium maculaque laterali prope apicem fuscis. Subtus niger nitidus, 

 postpectoris lateribus abdominisque apice luteis ; pedibus luteis femorum 

 dimidio basali tibiarum tarsorumque apicibus fuscis. Long. 4| lin. $ . 



Hab. Rio Janeiro. 



