DENDROCTONUS. 147 
regarded as typical by Dietz’. The specimen from Texas which stands in the Chapuis 
collection as D. terebrans (Oliv.) agrees in the structure of its epistoma and the scape 
of the antenna, but is smaller, pitchy-black in colour, with the front impressed in the 
middle; the occiput shining and coarsely punctured ; the prothorax scarcely bisinuate 
at the base, shining, and very strongly punctured ; the hairs very long and conspicuous 
towards the apex of the elytra. Its length is 5°5 millim. 
2. Dendroctonus parallelocollis. 
Dendroctonus parallelocollis, Chap. Syn. Scol. p. 36 (Mém. Soc. Liége, 18738, p. 244) *. 
Elongate and parallel-sided, piceous-black. Median segment of epistoma equal in length to lateral segments, 
with oblique sides and straight anterior border ; front flattened, with a median impression, posteriorly 
strigose ; vertex shining and punctured ; scape of antenna rather strongly clubbed, with rounded angles. 
Prothorax slightly narrowed anteriorly, the sides scarcely sinuate, the apical emargination shallow ; 
surface shining, rather strongly and not closely punctured, pubescence fuscous, the median line impressed. 
Elytra parallel-sided, narrow, strongly rounded and crenate at base, rather coarsely asperate, the asperities 
forming well-marked transverse ridges at the base, finer on the declivity ; stri shallow, not conspicuously 
punctured, pubescence fuscous, thin, long on the declivity only. Legs piceous. 
Length 6°3 millim. 
Hab. Mexico !. 
I have seen no other example than the type, which has unfortunately lost the club 
of both antenne. The species is distinct from any described from North America. 
From D. approximatus, Dietz, which it most nearly resembles, it differs in its smaller 
size, more elongate shape, more shining and strongly-punctured prothorax, and 
indistinct elytral stric. 
3. Dendroctonus adjunctus, sp. n. 
Oblongus, subdepressus, nigro-piceus, fusco-pilosus, subnitidus, fronte strigose impressa ; prothorace antice 
constricto, parcius punctato, linea media obsoleta ; elytris posterius dilutioribus, striato-punctatis, inter- 
stitiis granulatis, in declivitate subrugosis et uniseriatim pilosis. 
Long. 4°6—5°3 millim. 
Oblong, less elongate than D. parallelocollis, slightly depressed, piceous-black with apex of elytra lighter. 
Median segment of epistoma shorter than the lateral segments, its sides very oblique and elevated, its 
apical border concave ; front covered with close granules and punctures, with an interrupted median 
impressed line deepest at its junction with a slight transverse subocular impression ; vertex finely punc- 
tured ; antennee piceous, the scape with rounded club, 2nd joint of funiculus scarcely longer than 1st, 
club transverse oval, its sutures curved towards apex. Prothorax more transverse than in D. parallelo- 
collis, constricted in front, the apical emargination and basal bisinuation distinct; surface impressed behind 
apex and somewhat flattened, shining, the punctures sparse and not strong, the median line obsolete. 
Elytra feebly striato-punctate, shining, except at the closely granulate base, with somewhat scattered 
granules, obsolete on the declivity, interstices with rows of distinct long dark hairs from middle to apex, 
the first with a single series of stronger granules. Legs piceous. 
Hab. Guatemata, Totonicapam (Champion). 
A distinct species, resembling a Myelophilus rather than a Dendroctonus. But two 
specimens were taken. 
UU 2 
