72 
INSECTA SATJNDERSIANA. 
sensim acuto-angustato, apice incurvo, infra pilis brevissimis 
instructo. Oculi in fronte valde angusta sat approximate magis 
convexi. Carina postica thoracis medio non interrupta. Elytra 
basi lata, versus apicem valde angustata, supra late valdeque 
deplanata, lateribus parum elevatis. Pygidium semi-ovatum, 
apice late obtuse rotundato, medio longitudinaliter anguste 
impresso. Processus scutellaris mesosterni inter coxas inter- 
medias simplex.— Stenometopus, Jekel. A cttevoj, angustus , 
/j,eto 7TOV, frons. 
Typus : Phlceotragus pustulatus, Fabr., Sch. (nee plures species vidi). 
Obs. —In the conical attenuation of the elytra behind, the depression 
of the body above, and its convexity beneath (especially the pectus and the 
base of the abdomen), this group is certainly peculiar in shape amongst the 
actual genera: the forehead (front) is much narrower than in all the 
preceding, and the eyes encroaching upon it and rather globose give to the 
head a peculiar appearance. Moreover, the numerous cinnaharine macu- 
lations of the elytra upon a black ground render its analogy with the 
Ptychoderes less evident than that of the preceding. It is evidently much 
more distant in organization from Phlceotragus , and leads rather naturally 
to the genus Mecocerus. 
General Obs. —A character common to all the species of this group 
(and also to Hypselotropis) is the whitish colouring of the 7th and 8th 
joints of the antenna in the females, partly reproduced at the end of the 
same joints in the males, but often obsolete in the latter sex. The character 
of the male of Ptychoderes , having their antennse more or less developed 
according to the relative size of the specimens in each species, I have not 
observed here, and in specimens one-third smaller I have observed the an¬ 
tenna as long proportionally. Is this character constant in these groups, 
and is that variation peculiar to the former ? The species, however, seem 
to vary much less in size than in the true Ptychoderes. 
