264 
sible that a weak arsenical spray applied to the leaf-shoots will ward 
it off. 
This tendency of H. eruditus to attack young unopened leaves is 
noticeable, as it has hitherto been found in dry substances, betel, bock- 
bindings, the dead twigs of orange and vine, according to Hubbard 
(Ins. Orange, p. 173) sedulously avoiding any part of the tree so long as 
it retains its sap or remains moist. 
The other species to which I have referred I received from a gentle- 
man who informed me that it had been very destructive to some newly 
imported Dendrobiums in his orchid-house. It attacked the bulbs, 
aerial roots, and stems, from which I extracted several females, one 
male, and larvae. The parts injured were about one-sixth of an inch in 
diameter, and were channeled out by longitudinal burrows. The nur- 
seryman who imported the Orchids has informed me that the species 
in question came from New Guinea. I have reason to believe, though 
he has not informed me himself of the fact, that the insect has been 
destructive in his houses, and I can not feel sure that it has been con- 
fined to its native species. Under the circumstances I can not be sure 
of its original locality. It is closely allied to X. eurtulus Eichh., from 
which I could not separate it by description, but recently I have exam- 
ined the type of the latter insect, which obviously differs in points not 
brought out in the description. The only other species of close resem- 
blance to these two Xylebori is X. compacUis from Japan. They form 
a somewhat distinct group. 
Xyleborus morigerus n. sp. 
Brevis, compacta, cylindrica, nitida, ferruginea elytris nonnunquamutrinqueplaga 
discoidali picea, parce pilosa, thorace subgloboso, antice rugis transversa exasper- 
ato, margine apicali tuberculato, postice L*evi, parce punctato, supra scutellum plaga 
pilosa ornato ; elytris valde convexis versus apicem rotundatis-declivibus, subtilis- 
sime lineato-punctatis, interstitiis in declivitate pilis uniseriatis setulosis.* 
Long. l-8 mm . 
Mas. Minutissimus, depressus, pallide testaceus, longe pilosus, thorace lateribus 
valde rotunda tis, angulis posticis obtusis, antice tuberculato, postice subtilissime 
punctato; elytris ovalibus, depressis, fortiter ac irregulariter punctatis. 
Long, vix l mm . 
Hah. incert. ; in caulibus orchiduni ex Nova Guinea invectarum habitans. 
Bright ferruginous brown, in most specimens with a well-marked blackish, discoidal 
patch on each elytron. Head finely alutaceous, with very short pubescence, eyes 
deeply emarginate. Thorax transverse, slightly narrowed at base, base bisinuate, 
its angles obtuse, sides and apex strongly rounded, apical margin with six or seven 
tubercles; disk convex, not gibbous, anterior half pubescent and with concentric 
rows of asperities, posterior half smooth shining, with scattered fine punctures, and 
a median patch of pubescence above scutellum, which is small, cordate, and smooth. 
Elytra as wide as thorax at base and half as long again, sides straight to near apex, 
then abruptly and strongly rounded, very convex to middle, which is elevated, 
thence strongly declivous to apex; finely punctured in lines, punctures shallow, 
interstices flat, with a single row of punctures as numerous but finer than those of 
striae, glabrous to middle, thence bearing a single row of longish hairs. 
* It seems logical to me to describe Xylebori which is always done from the 9 in 
the feminine; if the usual manner is preferred, the genders can easily be changed. 
