130 Mr. 1). Slia^- Contributions to the 



middle, the last joint ncain ])alci-; 3rd joint rather long 

 and slender, considerably longer than the 2nd ; from the 

 4th to the lOtli each joint is a little shorter than its jn-e- 

 deccssor, the 4th considerably loiiger than broad, 7tli 

 about as long as broad, 8 — 10 rather transverse ; last joint 

 pointed, nearly twice as long as the 10th. Palpi yellow, 

 mandibles pitchy. Head broad, quite as broad as the 

 thorax, coarsely and irregularly ]uuictured, with a broad 

 inii)unctate space in the middle. Thorax about as long as 

 broad, a little narrowed behind, with two irregular lines of 

 ten or twelve coarse punctiu-es along the middle, separated 

 by a rather broad, impunctate space, and ^vith other 

 coarse, irregular punctures, especially numerous near the 

 anterior angles. Scutelluni large, rather strongly punc- 

 tured, with a narrow itujuuietate margin. Elytra broader 

 than the thorax, and about as long, greenish or bluish, 

 rather sparingly punctured. Hind body narrowed towards 

 the extremity, black, with the last two segments yellow ; 

 segments 2 — 5 moderately closely and distinctly punc- 

 tured, Gth more finely, 7th very finely punctured. The 

 four front legs yellow, the hinder ones pitchy. 



The male has a shallow, l)road notch in the middle of 

 the hind margin of the 7th segment beneath. 



Parii, Ega, St. Paulo, Pio Purus; sixteen individuals. 



Obs. — 1 judge from the specimens before me that this 

 is a variable species ; the individual from which the above 

 description is taken is a large male from St. Paulo, 

 having the head and thorax more coarsely punctured, and 

 the antenuiP more elongate than in the other individuals. 

 The individual from Rio Purus is a small female, having 

 the head and thorax spai'ingly pimctured, and is a little 

 smaller, narrower, and less depressed than the other speci- 

 mens. The two individuals from Para have the front legs 

 black, or nearly so, and the antennre rather shorter, Avhile 

 one of them has the elytra of a pitchy colour, with blue 

 reflections. In the absence of any definite characters to 

 separate these forms, I have considered them all as one 

 species. 



7. Xanthopyfjus ni(/ripes, n. sp. Xiger, nitidus, an- 

 tennis fusco-testaceis, elytris viridi-cyaneis, abdomine seg- 

 mentis duobus ultimis flavis. Long. corp. 5 lin. 



Closely allied to A', depressus, and distinguished only 

 by the following characters. The head is smaller, being 



