XYLEBORUS. 213 
The single example of this species in my collection approaches X. propinquus, but is 
more elongate, darker, appearing black except in a strong light, and has no trace of 
impressed striee, not even along the suture. I have not observed in any allied species 
the alternation in size of the interstitial punctures, which is readily appreciated with 
the aid of a microscope. 
27. Xyleborus intrusus, sp. n. 
Fem. Subelongata, sat nitida, parce breviter pilosa, ferruginea vel piceo-nigra ; prothorace latitudine longiore, 
apice rotundato, dorso umbonato, posterius distincte punctato; elytris subparallelis, apice obtuse rotundatis 
et infra haud acute marginatis, striato-punctatis, interstitiis remotius uniseriatim punctatis, apice fortiter 
convexe declivi, subnitido, obsolete punctato, interstitiis 1° et 3° tuberculatis, 2° haud impresso. 
Long. 2°7 millim. 
Female. Cylindrical, rather elongate, moderately shining, ferruginous or piceous-black, with short thin erect 
pubescence. Front flattened, dull, with a narrow median supra-oral carina, subimpressed and punctured 
on either side, the punctures deep towards the vertex, pubescence almost absent except round the mouth ; 
eyes broad, anteriorly emarginate ; antenne fuscous. Prothorax longer than broad, basal margin rounded, 
hind angles obtusely rounded, sides parallel to the middle, apex strongly rounded ; dorsum elevated just 
before the middle into an obtuse non-transverse tubercle, thinly pubescent round the margins, anteriorly 
asperate, its posterior half with distinct punctuation, the median line impunctate. Scutellum rounded. 
Elytra scarcely as wide at base as the prothorax and about one-half longer, subtruncate at base, shoulders 
rounded, sides parallel and not narrowed behind, the apical margin rather abruptly and obtusely rounded, 
almost truncate; surface cylindric to the posterior fourth, then strongly and convexly declivous, becoming 
subvertical at the apex, moderately strongly and closely punctured, in rather regular shallow strive, 
interstices narrow, with single series of remoter and finer piliferous punctures, the hairs short, becoming 
longer behind ; declivity not sharply margined below, subnitid, indistinctly punctured and not striate, the 
first and third interstices with two or three rather small tubercles, the second not impressed. Underside 
concolorous, subglabrous; the abdomen punctate ; legs fuscous. 
Hab. Guatemata, San Gerénimo (Champion). 
Three examples, one of which is ferruginous. This species is separable from its 
allies, which are of cylindrical form, with the prothorax oblong, and the first and third 
elytral interstices tuberculate behind, by the abruptly declivous and obtuse apex of the 
elytra. The strie are more regular and finely punctured than in X. torquatus. 
From X. posticus it is to be distinguished by the greater length of the prothorax, 
strongly rounded apical margin, the longer and more parallel-sided elytra, the deeper 
striee and tuberculate declivity. 
28. Xyleborus propinquus. 
9. Xyleborus propinquus, Eichbh. Berl. ent. Zeitschr. 1868, p. 281°; Rat, Tom. p. 367”. 
Hab. Norra Amenrica!, Tennessee ?.—MeExico, Jalapa (Hoge); GuaTemata, Chinautla 
(Salvin), San Gerdénimo (Champion); Nicaragua, San Juan (Sa//é). 
The few specimens here associated vary a little among themselves, but have been 
carefully compared with a typical example. With the exception of a pair from San 
Gerénimo, we have received but a single individual from each locality. ‘The infuscation 
