22 MISC. PUBLICATION 417, U. S. DEPT. OF AGRICULTURE 
half; transverse impression broad, moderately deep, scarcely arcuate; with a 
median, longitudinal, smooth, shining sulcus from epistoma to transverse im- 
pression; surface subopaque, finely, very densely granulate-punctate; hairs very 
fine, short, erect, inconspicuous except on epistoma. Eye short ovate, notably 
wider above, less than twice as long as wide, finely granulate. Antenna with 
first segment of club longer than the other three combined. 
Pronotum slightly narrower than elytra, about 1.14 times as long as wide, 
widest just in front of middle; posterior outline feebly arcuate, posterior 
angles slightly rounded, sides behind nearly straight and subparallel, but very 
feebly diverging to the widest point, then arcuately narrowed to very broadly 
rounded front margin; surface moderately shining, with very close punctures 
of moderate size (smaller than in-either tenuis or pusillus), often confluent, 
distinctly granulate throughout, punctures much finer in front and toward 
sides; sides densely, rather finely granulate-punctate; side margin not subacute 
behind; median line rather broad, distinctly elevated; hairs ‘short, fine, erect, 
searcely seen except in profile. 
Elytra distinctly wider than pronotum (34:30), about 1.94 times as long as 
wide; sides subparallel on anterior two-thirds, narrowly rounded behind; sur- 
face feebly shining; striae moderately impressed; punctures close, deep, mod- 
erately coarse; interspaces equal to or wider than striae, finely and densely 
granulate-punctate, narrower and more convex toward and on declivity; vesti- 
ture consisting of numerous rather short, fine hairs, more numerous and 
larger on declivity. Last abdominal sternite rather narrowly rounded behind, 
finely, rather closely, somewhat roughly punctured. 
Male.—Usually slightly smaller and wider, with pronotum nearly as wide as 
elytra; last abdominal sternite shorter, not grooved. 
Remarks.—Specimens of eailis from Texarkana and McNeil, Ark., 
were compared with the type from the Brussels Museum by J. M. 
Swaine, and found to be identical. In addition eight specimens from 
‘Texas, Mississippi, Florida, North Carolina, and the District of Colum- 
bia, and one without locality label were studied by the writer. The 
host is not definitely known, but specimens have been taken flying to 
down pine. All specimens were taken singly and were not asso- 
ciated with tenwis in the field. 
This species apparently had not been correctly identified in Ameri- 
ean collections until Doctor Swaine compared a number of short 
series of eastern species with Chapuis’ type. Leconte’s collection 
apparently contains no true ewi/is, the specimen so labeled being a 
variant of tens. : 
HYLASTES TENUIS Eichhoff 
-Hylastes tenuis Hichhoff, 1868, Berlin. Ent. Ztschr, 12; 147; Zimmermann, 1868, 
Amer. Ent. Trans. 2: 149: Chapuis, 1869, Synop. Scolyt., p. 19 (extract 
from Soc. Roy. des Sci. de Liége Mém. (2) 3: 227) ; Leconte, 1876, Amer. Phil. 
Soe. Proc. 15; 388, 389; Schwarz, 1878, Amer. Phil. Soc. Proce. 17; 469; Schwarz, 
1888, Ent. Soc. Wash. Proc. 1: 80; Hamilton, 1895, Amer. Ent. Soc. Trans. 22; 
346, 378; Hopkins, 1899, W. Va. Agr. Expt. Sta. Bul. 56: 345, 449; Swaine, 
1609, N. Y. State Mus. Bul. 134: 147; Swaine, 1918, Canada Dept. Agr. Ent. 
Branch Bul. 14 (2) : 79. 
Hylastes criticus Eichhoff, 1868, Berlin. Ent. Ztschr. 12: 147. 
Female.—Dark reddish brown to piceous, 2.4 to 2.9 mm. long, about 2.94 
times as long as wide. 
Frons very wide between eyes, frontal rectangle about 0.96 as long as wide, 
piceous brown, with epistoma reddish brown; epistoma moderately impressed 
at each side, elevated but not carinate in middle fourth; epistomal margin 
piceous, thickened, and liplike, its medium lobe broad and short, deeply im- 
pressed in middle third, with free end emarginate; transverse impression broad, 
not very deep, scarcely arcuate, with no indication of either carina or sulcus 
below it; surface subopaque, finely, closely punctate, feebly granulate; vestiture 
of fine, short, inconspicuous hairs. Eye ovate, wider above, twice as long as 
