418 HETEROMERA. 
Hab. Mexico, Guanajuato (Sallé). 
Four examples. In this species, and in A. longipennis and A. subnitida, the apical 
joint of the maxillary palpi (fig. 5 a) is narrower than in the allied forms ; and the tarsi 
are exceedingly long and slender. 
2. Alethia longipennis. (Tab. XIX. fig. 6.) 
Very elongate and parallel, narrow, slightly convex, dull piceous-brown, the elytra slightly shining, thickly 
clothed with short pubescence. Head very closely and rugosely punctured ; eyes convex, moderately large ; 
antenne long and very slender, ferruginous; prothorax small, comparatively elongate, not very much 
broader than long, feebly convex, the sides almost straight behind and gradually narrowing in front, the 
hind angles rectangular, the disc a little flattened before the base, the basal fovez obsolete, the surface 
punctured like that of the head ; scutellum closely punctured ; elytra very long, parallel to far beyond the 
middle, much wider and more shining than the prothorax, with narrow longitudinal grooves which become 
deeper towards the apex, the surface finely, thickly, and confusedly punctured, the usual rows of punetures 
distinct at the base only, the interstices feebly convex but flatter on the basal half of the dise; beneath 
sparsely and finely punctured, the sides of the metasternum more closely and more coarsely so; legs fusco- 
ferruginous, very long and slender, the tarsi very long and with the first joint of the posterior pair very 
elongate. 
Length 8 millim.; breadth 2} millim. 
Hab. Mexico, Aguas Calientes city (Hége). 
One example, possibly a female. Narrower and rather more convex than 4. salle?, 
the thorax less transverse, the elytra more shining and not so finely punctured. 4. longi- 
pennis bears a strong resemblance to various “ (édemerides.” 
8. Alethia subnitida. (Tab. XIX. fig. 7, 3.) 
Elongate, narrow, subparallel, piceous-brown, slightly shining, thickly clothed with long pubescence. Head 
closely but not very finely punctured ; eyes convex, comparatively large; antenn ( ¢) long and slender, 
ferruginous ; prothorax small, broader than long, slightly convex, the sides almost straight behind and 
gradually narrowing in front, the hind angles subrectangular, the dise slightly depressed before the base 
and apex, the basal foveze obsolete, the surface uneven and closely and not very finely punctured; scu- 
tellum sparsely punctured; elytra moderately long, subparallel in their basal half, much wider than the 
prothorax, with rows of fine approximate punctures placed upon shallow strie, the interstices almost 
flat, feebly convex at the apex, and finely and rather thickly punctured, the punctures of the strie 
becoming finer beyond the middle and there confounded with those of the interstices ; beneath closely and 
finely punctured ; legs ferruginous, long and slender. 
Length 84-83 millim.; breadth 2? millim. (<¢.) 
Hab. Mexico, Chilpancingo in Guerrero, Guadalajara in Jalisco (Hége). 
Two examples only. From J. sallewi and A. longipennis this insect is easily separated 
by its very differently sculptured thorax (the punctures separate one from another), 
more shining surface, shorter elytra, longer pubescence, &c. 
4. Alethia azteca. (Tab. XIX. fig. 8, 3.) 
Very elongate, narrow, much depressed, parallel, dull brownish-black, sparsely clothed with short pubescence. 
Head very closely and rugosely punctured; eyes moderately large ; antenns ( ¢ ) very long and slender, 
brownish-piceous; prothorax small, transverse, feebly convex, the sides almost straight behind and gra- 
dually narrowing in front, the hind angles obtuse, the disc a little flattened and shallowly impressed 
