402 MR. MARTIN JACOBY ON NEW SPECIES OF [DeC. 13^ 



flavous baud, and at the sides by the flavous latei'al margins ;; 

 abdomen testaceous, breast and legs pale piceons. 



Ilab. Amazons. 



The coloration of this species entirely resembles that of many 

 members of the genera Oedionychis and Asphcera ; but the shape 

 of the thorax and the non-inflated claws, as well as the elongate 

 metatarsus of the posterior legs, prove the insect to belong tO' 

 Disonycha. 



DiSONTCHA PERUANA, sp. n. 



Fulvous, the antennae, tibiee, and tarsi black, testaceous above ;. 

 the head with one, the thorax with five black spots ; elytra 

 impunctate, a narrow sutural and discoidal stripe and the lateral 

 mai-gins black. 



Length 7 millim. 



Head impunctate, testaceous with a central black sjsot, frontal 

 elevations feebly raised ; antennae black, not extending to the middle 

 of the elj'tra, the basal two joints fulvous below, third joint slightly 

 shorter than the fourth ; thorax one-half broader than long, the- 

 sides nearly straight, the anterior angles thickened, the posterior 

 ones strongly oblique, the surface impunctate, testaceous, with 

 five obsolete piceous spots, four anteriorly and one elongate at the 

 middle ; scutelkim black ; elytra impunctate, flavous, narrowly 

 edged with black, and a similar narrow stripe at the middle which 

 does not quite extend to the apex, elytral epipleuree testaceous 

 within ; under side testaceous, femora darker, tibiae and tarsi 

 black. 



Hah. Peru. 



A proportionately large-sized species, and diflfering from most of 

 its congeners in having the lateral black elytral stripes not placed 

 close to but at the actual margins ; the narrow shape of the stripes 

 and the entirely impunctate elytra will assist further in the 

 determination of the species. 



Disonycha albicincta, sp. n. 



Black ; thorax pale flavous, impunctate ; elytra bluish black, a 

 very narrow transverse band before the middle, another near the 

 apex, connected at the sides by a longitudinal stripe, white. 



Length 6 millim. 



Head with a few deep punctures near the eyes, black, very 

 shining, frontal elevations absent, carina very narrow ; antennae 

 black, the basal joint flavous below, fourth joint much longer 

 than the third, apical joint extending beyond the middle of the 

 elytra ; thorax scarcely twice as broad as long, the sides straight, 

 narrowly marginate, the anterior angles thickened, obtusely 

 rounded ; the disc impunctate, with a very obsolete transverse^ 

 groove near the base, pale yellow , scutellum black ; elytra micro- 

 scopically punctured, elongate and pai-allel, bluish black, metallic, 

 with two very narrow transverse bands connected at the lateral 

 margins by an equally narrow longitudinal stripe, the first band 



