194 Dr. Guy A. K. Marshall on 



duccd into two long obtuse subparoJlel processes; the shallow striae 

 with large deep regular punctures; intervals 3 and 7 much higher 

 than the others and each bearing a row of closely-set prominent 

 tubercles (8-9 in (^, 10-12 in $), those on interval 3 gradually increas- 

 ing behind, the last one (at the top of the declivity) being very 

 long, spine-lilie and directed backwards ; on int. 5 a single tubercle 

 behind the middle, and sometimes one or two rudimentary ones on 

 each side of it ; int. 9 with a row of small tubercles on the basal 

 half. Wings not functional, the tips not folded and reaching the 

 apex of the 4th visible ventrite. Legs with whitish scaling and sub- 

 erect white setae, the posterior pairs of femora v/ith a faint daiker 

 spot on the thickened part; the anterior tibiae not granulate 

 internally, the raucros short and hidden by setae ; the claws without 

 a lateral seta. 



Length, 14-19 mm. ; width, 6-8i mm. 



Brazil : Rio de Janeiro ; Santa Catharina. 



Described from seventeen specimens. 



This species stands in collections under the MS. names 

 of C. armatissimiis Chev. and C. serietnberculatus Jek. 

 Its only very near ally is C. ostracion Pasc, a pale fawn- 

 coloured insect with a broad median brown stripe extending 

 from the apex of the thorax to two-thirds the length of 

 the elytra; further the prothorax is much less strongly 

 rugose, the elytral tubercles are much smaller, and joints 

 5 and 6 of the funicle are broader than long. In both 

 species the wings are reduced and not functional. 



Compsus confluens, sp. n. 



(5*$. Integument black, densely clothed above and below with 

 chalky white scaling; the head, rostrum and antennae brown, 

 and a brown median stripe extending from the apex of the prothorax 

 on to the elytra a little behind the scutellum, being broadest in front 

 and gradually narro\Hng to a point on the elytra ; the front tibiae 

 and tarsi also brownish. 



Head strongly constricted behind the eyes, which are very promi- 

 nent, the forehead with a very deep longitudinal fovea. Rostrum 

 about as long as its apical width and very strongly dilated from 

 base to apex ; a very broad deep curved furrow just in front of each 

 eye, and a short longitudinal one a little above and in front of it, 

 but those dejiressions more or less concealed by the very dense 

 subcrect scaling; the apical area declivous (and thus separated 

 from the posterioi' pait by a transverse angulated edge) and broadly 



