StujihylinidcE of the Amazon Valley. 121 



punctured, especially in their centres, 7tli still more finely 

 and sparingly punctured. Legs black, Avitli the tarsi 

 reddish. The basal joint of the front tarsi quite as long as 

 the three folloAving together. 



The male has the hind margin of the 6th ventral seg- 

 ment slightly emarginatc in the middle, and the 7tli with 

 a triano-ular notch in the middle. The redeajjus is rather 

 broad and has the ligula Hat and bi'oad, similar in length 

 and breadth to the body of the organ, and closely applied 

 thereto. The front feet simjile. 



Tunantins ; one $ . 



Ohs.- — This species must be closely allied to Stophylinus 

 scenicus, Er., but I have no doubt a comparison will prove 

 it distinct therefrom. 



6. Plociopterus Imtus, n. sp. Niger, nitidus, antennis 

 (articulis 7 — 9 fuscis), pedibus, abdomineque rufo-testaceis ; 

 elytris cyaneis, fasciis duabus cinereo-pubescentibus. Long, 

 corp. 5^ lin. 



J\las : tarsis anticis leviter dilatatis, abdominisque apicis 

 structura complicate insignis. 



Antenna? rather long and slender, yellow, with joints 

 7 — 9 darker ; 3rd joint elongate, 4th about as long as 2nd ; 

 from 4 — 10 each is a little shorter than its predecessor; 

 last joint rather long, rounded at the extremity. Parts of 

 the mouth yellow. Head a little broader than the thorax, 

 black and shining, coarsely and irregularly punctured, 

 with the middle part smooth, the punctures behind the 

 labrum extremely large and confluent. Thorax much 

 narrower than the elytra, about as long as broad, .dis- 

 tinctly narrowed behind ; the sides a little sinuate, the 

 up]")er surface black and shining, very coarsely and iiTCgu- 

 larly punctured, a middle longitudinal space impunctate. 

 Scutellum closely and finely j^^^nctured, with a gi'cy 

 pubescence. Elytra longer than the thorax, blue, with two 

 bands of grey pubescence, one at the base the other a little 

 before the extremity, their punctuation moderately fine, 

 not close. Hind body narrowed towards the extremity, 

 yelloAv, Avitli the 2nd segment pitchy ; segments 3 — 6 finely 

 and rather sparingly punctured. Legs yellow, with the 

 coxas pitchy. The anterior tibia? are dilated behind 

 (especially in the male), and frirnished just below the 

 middle with three or four coarse seta) placed close to- 

 gether ; thence they are narrowed to the exti'emity. First 

 joint of front tarsus but little longer than the 2nd. 



