BY THE REV. T. BLACKBURX. 
1433 
H. IRIDESCEXS, sp.nov. 
Oblongo-ovatus ; sat niticlus, capite prothoi’aceque opacis sub- 
ii’idescentibus exceptis ; niger, antennis apice tarsisque rufescenti- 
bus ; capite inter oculos bifoveato ; protliorace quam longiori 
dimidio, postice quam antice paullo, latiori ; lateribus pone medium 
dilatato-i’otundatis, postice sinuatis, incrassatis, intus baud sulcatis; 
basi vix bisinuata anguste marginata ; angulis anticis rotundatis> 
posticis acutis retrorsum inclinatis ; dorso subtiliter obsolete longi- 
tudinaliter canaliculate ; basi utrinque foveata ; elytris sulcato- 
punctulatis ; punctis permagnis ; interstitiis ad latera manifeste 
nec fortiter, suturam versus vix, acute elevatis ; basi minus crasse 
marginata; mandibulis apice bifidis. [Long. 8, lat. 3? lines. 
This species seems to oscillate between Hyjmulax and Chileone, 
which are, T think, too close to be treated as distinct. The 
following characters have been omitted from the specific diagnosis 
because if the two genera named above are to stand, this insect 
might perhaps have to be treated as forming a third closely allied 
genus. Mentum moderately transverse ; angulated at the sides ; 
front margin notched in the middle ; surface convex, subcarinate 
down the middle with a depression on either side, hirsute (1 only 
in some examples) ; gular furrow moderate, placed well behind the 
suVjmentum. Epistomal suture well marked, curved. Labrum 
rather decidedly emarginate in front. Joints 3 and 4 of antennae 
nearly equal, a little longer than the following joints ; joints 8-11 
gradually and not strongly thickened. Prosternal process dis- 
tinctly turned up at the apex. Third and fourth venti’al segments 
sinuate behind. In other respects aj^pears to agree with the 
generic characters of llypaidax. 
It may be added that the punctures in the I'ows on the elytra 
are placed far apart, and that there are about 12 to 15 ])unctures 
in each row from the base to the beginning of the i)Osterior 
declivity (except the row nearest the suture which is bent round 
in front nearly to the base of tlie third row, and so contains more 
punctures); that the head and piothorax are scarcely visibly (or 
