_ XYLEBORUS. 207 
not abruptly declivous, with very feebly impressed rows of rather shallow punctures, interstices flat, 
narrow, their punctures finer, piliferous, uniseriate on the first and succeeding alternate interstices, very 
irregularly biseriate. on the remainder; declivity moderately convex, irregularly punctured, with two 
tubercles on each side near the suture, and some smaller ones in the line of the 3rd and Sth interstices. 
Underside and legs sordid-testaceous ; spines of the tibie not numerous. 
Hab. Guatemata, Rio Naranjo (Champion). 
One example. This is a distinct species in which I am unable to recognize any 
close affinity with described forms. Its chief peculiarity resides in the alternate 
arrangement of the interstitial punctures on the elytra. 
16. Xyleborus spathipennis. (‘Tab. VII. figg. 18, ¢; 19, 2.) 
9. Xyleborus spathipennis, Eichh. Berl. ent. Zeitschr. 1868, p. 1541; Rat. Tom. p. 347°. 
&. Xyleborus coronatus, Eichh. Rat. Tom. p. 348°. ° 
Hab. Nicaracva, Chontales (Belt); Panama, Volcan de Chiriqui (Champion).— 
Braziu 123, 
There can be reasonably no doubt that, as Eichhoff suggests, X. spathipennis and 
XY. coronatus are sexes of the same species. ‘The difference between them lies entirely 
in the shape of the prothorax, which in the male is deeply excavate in the front and 
armed with three processes, the middle one subquadrate, concave above and prolonged 
over the head, the lateral processes obtusely pointed. This structure is precisely like 
that found in the males of the Madagascar species, X. cornutus, Schauf., and 
X, neptunus, Schauf. Most of the examples I have seen of this species have been 
Nicaraguan, and its inclusion among the insects of Brazil seems to require confirmation. 
17. Xyleborus rugicollis, sp. n. 
Fem, Oylindrica, subopaca, nigra, antennis et pedibus fuscis, breviter griseo-pilosa ; prothorace subquadrato, 
supra post medium granulato; elytris versus apicem rotundatum paullo dilatatis, striato-punctatis, 
interstitiis irregulariter seriato-punctatis et rugosis ; declivitate convexa, interstitiis 1° mutico, 2° sat 
fortiter, sequentibus subtilius tuberculatis. 
Long. 4°7 millim. 
Female. Cylindric, black, scarcely shining. Front convex, closely and strongly punctured, with a narrow 
subelevated smooth median line, pubescence scanty, the mouth fringed with long hairs. Prothorax 
scarcely as long as wide, slightly narrowed from the base forwards, the sides and apex separately and 
very slightly rounded, the general shape subquadrate, but with the anterior angles not well marked, 
hind angles obliquely rounded ; surface with an obtuse transverse median elevation, scantily pubescent, 
and entirely asperate, the asperities fine and granular over the hinder half. Scutellum small, rounded. 
Elytra as wide at base as the prothorax, and rather less than twice as long, their sides straight but very 
slightly divergent from the base to the apical fourth, thence broadly rounded, the apical margin obtuser 
in the middle; surface subconvex from the base to the strongly rounded declivity, closely punctured in 
substriate rows, impressed behind the middle; interstices transversely rugulose, and irregularly marked 
with finer punctures, which tend to form series and are piliferous towards the apex, the second with 
two or three strong tubercles, the remainder with less-marked tubercles on the declivous portion, the 
first with traces of tuberculation before the declivity only; pubescence short, thin, and irregular, with a 
few longer interstitial hairs. Underside piceous-black, the legs fuscous. 
