XYLEBORUS. 219 
but evidently punctured behind, a little closer around the median impunctate line, pubescence very 
scanty, erect. lytra less than a half longer than the prothorax and a little narrower, paralled-sided to 
the posterior fourth, then slightly narrowed with the apex rounded, surface cylindrical, obliquely 
declivous behind, lineato-punctate, the punctures close, a little irregular posteriorly, the sutural stria 
slightly but evidently impressed ; interstices flat, rather narrow, and almost impunctate, at the sides and 
apex with a few seriate bristles; declivity somewhat flattened and impressed along the suture, with 
the strive obsolete, finely tuberculate in the line of the interstices, with two strong tubercles on each 
side of the suture, its surface finely and subrugosely punctured. Underside and legs ferruginous. 
Hab. Guatemata, Zapote, El Tumbador (Champion); Nicaraaua, Chontales (Janson) ; 
Panama, Tolé (Champion). 
This species, of which Mr. Champion took six and Mr. Janson two examples, is a 
close ally of X. declivis and X. monographus, Ratz., bearing the same relation to the 
former as the latter does to X. celsus. From X. declivis it is differentiated by its smaller 
size and less elongate elytra; it is not so shining, the prothorax is more distinctly 
punctured, and the rows of points on the elytra appear in a favourable light to be more 
impressed. From X. monographus it is separated by its more obliquely declivous 
elytra, the interstices of which are more shining and almost impunctate and hairless 
before the apex. In a single specimen from Zapote the elytra are relatively shorter 
and somewhat narrower; this is probably a male character, but there is no difference 
in the structure of the prothorax. 
37. Xyleborus guanajuatensis. 
Xyleborus (Aneretus) guanajuatensis, Duges, Ann. Ent. Soc. Belg. xxxi. p. 140, t. i. figg. 11-22'. 
Hab. Mexico, Guanajuato '. 
From Dugés’s lengthy account of this insect, which is mainly descriptive of the early 
stages, the species appears to be a small Xyledorus of the affinis group. It cannot be 
identified from the description, which gives no reasons for adopting the provisional 
generic name, Anwretus, considerately proposed in case it should be required. 
Subgroup III. HYLOCURI. 
Hylocuride, Kichhoff, Rat. Tom. p. 298 (= Micracides, Leconte, Rhynch. N. Am. p. 367). 
The Hylocuri are at once separated from the rest of the Tomicides by the six-jointed 
funiculus and mucronate elytra (not exhibited by Thysanoes). The single Central- 
American genus Hylocurus approaches closely to Leconte’s genus Micracis. There is, 
however, some discrepancy about the characters of the latter, and they are given 
differently by Leconte and Hichhoff, who possibly had not seen an authentic example of 
Leconte’s species. The scantiness of my material has not allowed me to make a close 
study of Micracis or to separate it from Hylocurus. Species I have seen are different 
in facies from those of the latter genus, and no such sexual characters as occur in 
Hylocurus have been described among them. 
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