3382 HETEROMERA. 
Hab. Guatema.a, San Joaquin in Vera Paz (Champion). 
Four examples. This species has the thorax unusually short and very strongly 
transverse, the thorax itself and the head peculiarly coloured. The form of the 
thorax and the brownish-cinereous (not black) elytral pubescence separate it from 
M. nigripilis. 
39. Mordellistena brunneipilis. (Tab. XV. fig. 1, ¢.) 
Elongate, rather narrow, slightly cuneiform, above and beneath, the antenns, palpi, and legs (the hind tibial 
spurs excepted) black; the upper surface with a slight brassy lustre, densely and uniformly clothed with 
rather coarse brownish or brownish-cinereous pubescence. Head short, strongly transverse, the eyes 
large ; last joint of the maxillary palpi moderately stout, scalene-triangular ; antenne short in both sexes, 
joints 3 and 4 subequal, 5-11 moderately thickened, 5 longer and much stouter than 4, 6-10 as broad as 
long ; prothorax short, strongly transverse, not very convex, narrowed behind, the hind angles rather 
obtuse ; elytra elongate, subparallel in their basal half ; beneath densely pubescent, the pubescence a little 
paler than above ; pygidium moderately long, more than twice the length of the hypopygium in the male, 
shorter in the female; the hind tibie with three or four, the first joint of the hind tarsi with two or 
three, and the second joint with two, very faint, short ridges. 
Length to end of the elytra 3-33, to tip of the pygidium 34-4, millim. (¢ 2.) 
Hab. Guatemata, Totonicapam 8500 to 10,500 feet (Champion). 
Numerous examples, all from the pine-forest region of Los Altos. This is one of 
numerous very closely allied species. It is chiefly distinguished by its short, strongly 
transverse, and somewhat flattened thorax, short antenne, the penultimate joints of 
which are as broad as long, and black limbs; the pubescence of the upper surface is 
uniformly brown. 
40. Mordellistena umbrosa. 
Elongate, narrow, slightly cuneiform, above and beneath, the antenne, palpi, and legs (the hind tibial spurs 
excepted) black ; the pubescence fine, dense, uniformly black or blackish-brown. Head short, strongly 
transverse; palpi and antenne asin WM. brunnewpilis; prothorax short, transverse, rather convex, narrowed 
behind, the hind angles obtuse; elytra and pygidium as in WM. brunneipilis; the hind tibie and the first 
joint of the hind tarsi each with three, the second joint of the hind tarsi with two, very short, faint 
ridges. 
Length to end of the elytra 23-33, to tip of the pygidium 23-43, millim. (¢ 92.) 
_ Hab. Mexico (Sallé), Xucumanatlan, Amula, Mexico city (H. H. Smith). 
Seven examples. Very near I. brunnetpilis, but differing from it in the blacker and 
finer pubescence, and in the less transverse and more convex thorax. The legs, antenne, 
palpi, and head are black, the antenne short in both sexes. 
- 41. Mordellistena murina. 
Elongate, somewhat cuneiform, black, the anterior portion of the head sometimes testaceous ; the pubescence 
rather coarse, usually brown or brownish-cinereous, sometimes with darker hairs intermixed. Head 
moderately large, the eyes not prominent; palpi varying in colour from testaceous to piceous, the last 
joint of the maxillary pair rather stout, long, and somewhat cultriform in the male, shorter in the female ; 
