298 Phytophaga Malayana. 



Genus Agasta, Hope. 

 Coleop. Man. iii. p. 177. 

 Corpus ovatum, convexum. Caput parvum ; antennis thorace 

 paullo longioribus, articulo basali incrassato, secundo brevi, 

 tertio elongate, sequentibus gradatim crassioribus; palpis 

 niaxillaribus brevibus, articulo primo minimo, secundo multo 

 crassiori, tertio quartoque rhombiformibus. Thorax trans- 

 versus. Elytra elongato-quadrata, confuse punctata. Pedes 

 simplices ; unguiculis muticis. 



1. Agasta formosaf Hope. 

 Coleop. Man. iii. p. 177, pi. ii. fig. 3. 



Flava, thorace nigro-quinque-notato, elytris cyaneo-maculatis. 



Var. A. Thoracis maculis plus minusve obsoletis. 



Var. B. Thorace toto nigro. 



Long. 5 lin. 



Hab. Java, Singapore ; also Siam, China. 



Thorax twice as broad as long, sides slightly diverging from base 

 to apex ; surface somewhat irregularly punctured on the sides, 

 smooth on the disk, marked with five black spots, a small one 

 on either side near the middle of the lateral margin, a lunulate 

 one on either side the middle disk, and the fifth clavate, lon- 

 gitudinal, placed behind the others just in front of the scutellum. 

 Elytra much broader than the thorax, oblong-ovate, irregularly 

 punctured, each with eight blue- black spots, viz., two at the base, 

 one of which is large and covers the humeral callus, the other 

 small, on the outer border ; two just before the middle of the disk, 

 both large, one subtriangular, near the suture, the second trans- 

 versely oblong, attached to the lateral margin ; one nearly round, 

 on the middle of the disk ; two placed transversely and slightly 

 obliquely behind the middle, the first near the suture, either round 

 or subtriangular, the second transverse, on the outer border ; the 

 eighth, round or subtrigonate, is situated on the middle disk just 

 before its apex. 



Genus Plagiodera, Redtenb. 

 Faun. Austr. p. 553. 

 Corpus oblongum, modice convexum. Caput modice exsertum ; 

 antennis dimidio corporis brevioribus, subfiliformibus ; palpis 

 maxillaribus gracilibus, articulis cylindricis. Thorax trans- 

 versus. Elytra thorace latiora, confuse aut striatim punc- 

 tata, limbo inflexo concavo. Pedes mediocres, simplices ; un- 



