Melolonthid Genua Ancistrosoma. \21 



line of the pronotum and the posterior part of the sulci are 

 yellow. There is a gradation in the latter, the dark and 

 light scales being, intermixed in the middle. The species is 

 thus intermediate between A. klugi and A. rufipes, the seta? 

 or scales upon the upper surface of the latter being of the 

 same narrow shape hut entirely dark coloured, while in 

 A. klnyi they arc entirely light. The lobes of the clypeus 

 are shorter and broader in the male of A. intermedium than 

 in either of the other forms, and the body generally is a 

 little stouter and less elongate. The ventral process is 

 rather broad and strongly angulated behind near the base. 

 The redcagus is shown in fig. 1 a and that of A. klnyi in 

 fig. 1 b. 



I do not know the female. 



Ancistrosoma hilare, sp. n. 



Fusco-brunneum, nitidum, pronolo nigro, pedibus (abdominisque 

 plerumque extremitate) flavibus, capite toto, pronoti margine et 

 iinea minuta ruediana antica, elytrorum vitta lata subsuturali, 

 secunda multo abbreviata inargiueque externa postica setis vel 

 squamis laete aurantiacis ornatis, pectore dense, pedibus seg- 

 meutorumque ventraliam marginibus hand dense flavo-hirsutis : 



<5 , clypeo acute bidentato, pygidio inflexo, setis flavis late mar- 

 ginal), medio lsevissimo, abdomine apice excavato, processu basali 

 valido, fere recto, haud acuto : 



2 , clypei margine antico subtilissime biarcuato, fere recto, pygidio 

 leviter convexo, sequaliter setoso, linea angusta mediana denudata. 



Long. l!G— -JU mm.; lat. max. 11-12 mm. 



Hal). Peru (ex coll. Mniszech), Colombia. 

 A male and two females were included in an interesting 

 series of Ancistrosoma kindly submitted to me by M. Rene 



Oberthur, who, possessing the types of Salle's descriptions, 

 has enabled me to examine all the species of the genus 

 hitherto known. One of the two females is the type now in 

 the British Museum. 



The setae with which this species is decorated are of a rich 

 orange colour, and those of the pronotum and elytra assume 

 the form of fairly large oval scales. The pronotum has only 

 a narrow border and a traee ot a median line in the anterior 

 part. The scutellum is almost devoid of setse. The elytra 

 have each a broad stripe near the suture, a very short one 

 adjacent to it, sometimes a few scales representing a third 

 stripe, and a short marginal border at the posterior part of 

 the outer vd<j;e. It is closely related to A. blanchardi, Salle, 

 but more massively built, with larger, broader, and more 



31* 



