new genera and species of Callichrominoj. 399 



The variation in colour of this sjjecies extends from rich 

 dark-bhie to greeuish-blue, and the black velvety pile in fresh 

 specimens is visible chiefly in slight depressions on the elevated 

 disc of the thorax, at the base of the elytra, in the sutural 

 depression, and on the sides. lu some individuals there is a 

 sparse and fine punctuation along the shining and slightly 

 elevated central line of the elytra, from the shoulders to the 

 apex. The scutellum varies in length and in the number of 

 transverse wrinkles ; in some examples the latter being replaced 

 near the base by a finer granulation. The sexes do not differ 

 except in the usual character of the number of ventral segments, 

 the $ having six and the 9 fi'^e only. The antenna; differ 

 veiy slightly in length, being in both sexes a little sliorter than 

 the body. 



Cameroons, also Angola. 



Mecaspis cromis. 



Splendide aurata, subvlridis : antennis et pedibus nigris, ilUs 

 scapo castaneo-rufo, his femoribus (basi et apice exceptis) san- 

 guineis, tarsis argenteo-pilosis : capite fere leevi : thorace disco 

 elevato sparsim punctato vix ruguloso, sulcis anticis et posticis 

 hTvibus : elytris passim hand crebre punctulatis, plagis sub- 

 humerali et sublaterali tenuiter velutinis : margine laterali mox 

 ab humero usque paulo ante apicem explanato-reflexo : prosterno 

 (ante pedes) utrinque vitta griseo-pilosa. 



$ Antennte lireves, dimidio corpori a^quales. Segmentum 5 

 ventrale apice crassi-marginatum vix sinuatum. Long. 20 liu. ^ • 



Agrees with the following species in the reflexed-explanate 

 lateral margins of the elytra, and in the pilose vitta on each 

 side of the anterior part of the prosternum ; but differs in the 

 liright golden colour, shorter antenna^, punctured thorax, and 

 form of last ventral segment. There is but a very slight trace 

 of velvety vitta on the disc of the elytra. 



Gaboon. 



Mecaspis explanata. 



Saturate viridi-cyanea, elytris plaga basali vittisquo sutnrali 

 et sublaterali ca?ru]eo-violaceo-velutinis : antennis pcdil)US(|ue 

 uigris, tarsis argenteo-pilosis, femoribus interdum medio rufis : 

 capite subtihter punctulato : thorace la^vi, disco elevato utrinque 

 violaceo-velutino : elytris amplis, margine laterali ex])lanato- 

 rcflexo, supra politis sparsim punctulatis, vittis violacco-vclutinis 

 opacis : propectore utrinque griseo-piloso. 



