VITTATE CHRYSOMELID BEETLES DISONYCHA — BLAKE 63 



them in the imusually long antennae. Except for this and the pale 

 head, the beetles resemble Disonycha iiigrojasciata («Tacoby). 



Disonycha jiiruensis, new species 



Figure 45 



About 7 mm. long, broadly oblong oval, not very convex, with 

 moderately wide explanate margins, shining, yellowish brown with 

 reddish brown spot on the occiput, an irregular reddish brown fascia 

 across pronotum, and wide reddish brown sutural, submarginal, and 

 median elytral vittae not joined at the apex; body beneath pale, 

 femora with a brown streak, tibiae and tarsi reddish brown. 



Head with interocular space a little less than half width of head, 

 occiput smooth with a reddish brown oblong spot, a fovea or cluster 

 of punctures on each side near eye, tubercles distinct, carina narrow 

 and a little produced, labrum dark, eyes not any larger or more 

 emarginate than in rest of species of Disonycha. Antennae dark, with 

 the three basal joints pale edged, long. Prothorax fully twice as 

 broad as long with wide anterior angles, rather flat and depressed 

 along base, with a slight callosity on the side, shining, a broad and 

 irregular reddish brown fascia nearly reaching the margin, faintly 

 5-spotted. Scutellum dark. Elytra broad, rather flat with a 

 wide explanate margin, shining, the pale yellow vittae not so wide 

 as the reddish brown, the latter not quite joining or reaching apex 

 or base, sutural edges pale, sutural and median vittae wide, the 

 submarginal narrower. Epipleura pale. Body beneath pale, the 

 femora with a dark streak and hind femora with dark apex, tibiae 

 and tarsi dark. Length 7 mm., width 3.9 mm. 



Type : Male, in BM, from Rio Jurua, Amazon region, Brazil, Novem- 

 ber 13, 14, 1874; paratype, female, USNM 61830, from Rio Purus, 

 Amazon region, Brazil, October 1874. 



Remarks: This is another of the large species with broad elytra, 

 closely related to D. imitans (Jacoby) from Peru. It is unusual in 

 having reddish brown markings. The aedeagus resembles somewhat 

 that of D. imitans, but in this species the eyes are smaller. 



DisonycJia amplipennis, new species 



Figure 50 



About 8 mm. in length, broadly oblong oval, shining; pale yellow; 

 head with a dark occipital spot; prothorax short and broad, with faint 

 reddish brown spotting; elytra broad and moderately convex, with 

 wide dark sutural and median vittae, the submarginal one narrow 

 and not reaching the apex; a dark streak on anterior femora and 



