HYLASTES. 145 
middle and impressed on either side. Prothorax a little broader than long, contracted in front, the sides 
and apex rounded ; disc closely and finely granulate, with an elevated shining median line not reaching 
the apex, pubescence very short and inconspicuous. Elytra wider than the prothorax and twice as long, 
not strongly rounded at the base, their sides straight and subparallel ; surface with a very short, fine, 
fulvous pile, denser and squamiform on the declivity, which is often covered in addition with a brownish 
crust, with punctured striz, weaker at the sides towards the base and deeper posteriorly, interstices very 
slightly convex, flattened on the declivity, finely and closely rugose, with single series of inconspicuous 
tubercles behind the middle, and of setae commencing at the basal third. Front tibie as strongly dilated 
and serrate as in the species of the preceding section. 
Length 4:3-5:5 millim. 
Hab. Mexico, Pinos Altos in Chihuahua (Buchan-Hepburn), Ciudad in Durango, 
Ventanas (Forrer), Suapam (Sad/é); Guarema.a, San Joaquin in Vera Paz, Totonicapam 
(Champion). 
Numerous specimens. Two examples from Vera Paz are brown and closely resemble 
H. rugipennis, Mannerheim, but have the prothoracic punctures closer and more rugose, 
so that the interspaces are not distinct and shining. In one the frontal carina is 
obsolete. ‘These insects may possibly be distinct, but I do not observe any precise 
characters by which they can be separated. 
4, Hylastes incomptus, sp. n. 
Oblongus, subnitidus, niger, longe pilosus, antennis pedibusque rufescentibus ; rostro carinato; prothorace 
latitudine longiore, supra fortiter irregulariter punctato, linea media levi subelevata; elytris subtiliter 
punctato-striatis, interstitiis rugose granulatis. 
Long. 5°5 millim. 
Oblong, black, with long pubescence. Head closely and strongly punctured, rostrum with an arcuate impression 
at base, and an impression at apex on either side of the median carina. Prothorax longer than broad, its 
hind angles rounded, sides nearly straight to behind middle, then gradually rounded to apex ; disc rather 
flat, with long, thin, fulvous pubescence, shining, with strong irregular unequal punctuation, median line 
subcarinate to near apex, shining. FElytra a little wider than the prothorax and not quite twice as long, 
with fine punctured striz, nearly obsolete at the base, interstices with close asperate granules, their apical 
third with single rows of tubercles bearing long sete and a pile of short decumbent hairs. Antenne, 
tibia, and tarsi rufescent; anterior tibie abruptly truncate, the upper margin with two prominent teeth 
before the apical angle. 
Hab. Mexico, San Andrés Chalchicomula (Sallé), Salazar (Hoge), Chilpancingo in 
Guerrero (H. H. Smith). | 
One example from each locality. This is a very distinct species, differing in the 
long hairs from any other Hylastes known to me, and in this respect approaching 
Dendroctonus. 
5. Hylastes variegatus, p. n. 
Subelongatus, opacus, breviter pilosus, niger, antennis tarsisque rufescentibus, elytris brunneis, squamis hic 
illine pallidioribus vestitis ; rostro subcarinato ; prothorace dense granulato ; elytris punctato-striatis, 
interstitiis subconvexis ad basin rugosis, postice uniseriatim tuberculatis et setosis. 
Long. 4 millim. 
Rather elongate. 
rostrum wide, indistinctly carinate, 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 6, August 1897. UU 
Head black, with mouth reddish, closely reticulate and punctured, shortly pubescent ; 
not impressed at junction with front; antenne reddish, with club 
