AULACOSCELIS. 5 
Closely allied to A. femorata, but differing in the thorax being more quadrate and 
much more finely punctured, and also in the general dark, nearly black, coloration. 
8. Aulacoscelis sanguinea. (Tab. XXXV. fig. 10.) 
Broadly ovate, sanguineous, the antenne, knees, tibie, and tarsi black ; elytra opaque, entirely impunctate. 
Length 4 lines. 
Hab. Mexico, Chilpancingo in Guerrero (Hége). 
Closely allied to A. hégei, but much shorter and more broadly ovate; the thorax 
distinctly transverse, with the sides nearly straight; the elytra entirely opaque and 
impunctate, without depression or coste in either sex; the antenne longer and nearly 
half the length of the body; and the colour of the upper surface bright red, the head 
and thorax only being shining. 
9. Aulacoscelis elongata. (Tab. XXXV. fig. 5.) 
Elongate, parallel, pale fulvous, the antenne (the first joint excepted), knees, tibie, and tarsi black; head and 
thorax impunctate, shining ; elytra finely pubescent, opaque. 
Length 6 lines. 
6. Head longer than broad, not constricted behind, with only a few fine punctures near the eyes; the clypeus 
separated from the face by a transverse groove, and at the sides by a short thick ridge in front of the 
antenne; antenne half the length of the body, the first joint fulvous, the others black, the third joint 
one half longer than the second but shorter than the fourth; thorax quadrate, not broader than long, the 
sides evenly rounded at the middle, the basal and apical margins nearly straight, the surface slightly 
convex, entirely impunctate, the base with a short and rather obsolete longitudinal groove on each side; 
scutellum pubescent ; elytra but slightly narrowed towards the apex, covered with a long and silky 
pubescence which hides any punctuation ; underside and the femora fulvous, the breast pubescent like 
the elytra, the intermediate tibie curved; the first joint of the anterior tarsi dilated ; the last abdominal 
segment deeply emarginate at the apex. 
Hab. Mexico, Playa Vicente (Sallé). 
This is a large and peculiar-looking Awlacoscelis and has much the appearance of a 
species of the family Elateride. The typical characters of the genus are, however, 
well expressed in the shape of the thorax and its short longitudinal groove, as well as 
in the broad elytral epipleure, the armed tibie, and the simple claws. Only a single 
male specimen is contained in the Sallé collection. A. elongata differs from all its 
allies in the elongate and parallel shape and pubescent elytra. 
10. Aulacoscelis femorata. (Tab. XXXV. figg. 3, 4.) 
Elongate, parallel, fuscous or piceous; head and thorax fulvous, the latter distinctly punctured; elytra 
testaceous, finely pubescent. 
Var. Head partly, the elytra entirely, dark fuscous. 
3. Head broad, all the femora strongly dilated. 
9. Head narrower, the elytra with a longitudinal depression at the base, the femora less strongly developed. 
Length 34-43 lines. 
g. Head broad, not constricted behind the eyes, the latter small, the vertex and lower portion finely and 
rather closely punctured and sparingly pubescent, the space between the antenne raised on each side into 
