138 Mr. G. Lewis on new Japanese Histeride. 
nitidus ; fronte post oculos subtuberculata ; elytris striis dorsali- 
bus 2 abbreviatis, obsoletis. L. 2 mill. 
Allied to 7. americanus, but more convex, with the forehead 
behind the eyes more elevated, the elytra strigose-punctate at 
the sides, and the margin simple, not reflexed. 
I have only one specimen; it was taken in an old tree at 
Kiga, near Miyanoshita, May 1880. 
Tryponeus fagi, n. sp. 
Cylindricus, niger, nitidus, undique punctatus; antennis pedibusque 
rufo-piceis. L. 4 mill. 
do. Frontis lateribus basisque margine elevatis; proncto antice 
retuso, medio subelevato. 
9. Fronte plana, in medio depressa ; pronoto antice convexo. 
T. kalemantenus is rather shorter and broader than this 
species, but the two are nearly allied. The prosternum in 
7. fagt has no lateral stria, and the thoracic marginal line con- 
tinues well round the basal angles. 
The perfect insects of Tryponceus prey on those of Platypus, 
and it is useless seeking for the former in trees not infested 
by the latter, which go 6 or 8 inches into the trees and are 
followed by the Histerids. It is impossible to say from ob- 
servation whether the spines or processes on the apices of 
the elytra of the wood-borers protect them in any way from 
their enemies, but I think they do not, and that they have other 
uses. Zryponeus cannot turn round in the trees, but can 
move backwards or forwards in the narrow galleries with 
almost equal facility. It can only be caught, as a rule, when 
traversing the distance between two holes ; but I have beaten 
stray specimens in summer, 
Tryponeus venator, n. sp. 
Niger, nitidus, filiformis, parum dense punctatus; antennis pedibus- 
que piceis; prothorace stria laterali integra, prosterno utrinque 
striato. L. 33 mill. 
3. Rostro apice modice reflexo, thorace antice linea in medio yix 
elevata. 
@. Fronte excavata.” 
This species is more filiform than any other I know from 
Asia, and is remarkable for its cylindricity, because the eastern 
forms of the genus are usnally much more robust than the 
American species. 7. venator teeds on a much smaller Platypus 
than 7. fagi; each species preys, in fact, on an insect of its 
own girth. ‘The male has the thorax a little longer than the 
female and slightly compressed at the sides. 
