South- American Coleoptera. 301 



broader to near the apex, where they are two and a half times 

 as broad as at the base, rather flattened posteriorly, where 

 they are much rounded, not deflexed at the sides ; fulvous 

 yellow except the apical fourth, which is purple-black ; each 

 elytron has three costas, the second and third of which both 

 arise from the shoulder, between the first and second an inter- 

 rupted costa may be traced at the base ; the intervals, and 

 especially the lateral expanded portion, are strongly reticulate, 

 the ground-colour being more or less grey, making the yellow 

 reticulations very conspicuous ; in the apical portion the reti- 

 culations are concolorous with the ground. 



Hah. Chiguinda. 



This insect closely resembles Lycidola retifera above de- 

 scribed. 



Themistonoe humeralis, n. sp. 



Nigra ; capite fulvo-flavo, macula verticis strigaque pone oculos 

 nigris ; thorace fulvo-flavo, vittis tribus latis nigris ; elytris ad 

 apicem sat ampliatis, ad latera deflexis, macula humerali fascia- 

 que lata post medium fulvo-flavis ; coxis, femoribus quatuor anti- 

 eis pectoreque fulvo-flavis. 



Long. 9 lin., lat. elytr. 41in. 



First joint of the antennse thick and cylindrical, the third 

 joint twice as long as the first, thick, clothed with dense black 

 pile ; the following joints short, not quite black. Head and 

 thorax rusty yellow, with a spot on the vertex of the head and 

 a broad stripe behind each eye black ; these black marks are 

 continued on the thorax. The thorax is subcylindrical, 

 slightly constricted before and behind the middle, with some 

 strong punctures on each side of the mesial black stripe and 

 along the base. Elytra with prominent angular shoulders, 

 gradually and moderately dilated towards the apex, where 

 they are two thirds broader than at their base, flat on the back 

 (except at the apex), strongly deflexed at the sides (almost 

 perpendicularly so near the base), strongly and closely punc- 

 tured at the base, more finely posteriorly; the humeral keel is 

 very strong, there is also a strong costa on the expanded por- 

 tion, arising at shoulder and extending to the apex ; there is 

 a rusty yellow stripe on the shoulder, turned posteriorly 

 towards (but not reaching) the suture ; there is also a thin 

 rusty yellow stripe on the margin below the shoulder, and a 

 broad band behind the middle, which is dentate on both its 

 margins ; the apex of each elytron is completely rounded. 

 The middle of the sterna and the middle of the basal portion 

 of the abdomen are dirty yellow. $ . 



Hah. Sarayacu. 

 Ann. & Mag. N. Hist. Ser. 5. Vol. v. 21 



