ACBOCYUM. 381 



nearly equal in length ; thorax transverse, the posterior margin curved, the anterior angles acute and 

 slightly thickened, the surface without transverse groove ; scutellum triangular ; elytra sparingly punc- 

 tured, their epipleurae continued to the apex ; posterior femora moderately thickened ; tibiae simple, not 

 channelled, the posterior ones armed with a short spur ; claws appendieulate ; prosternum narrow, widened 

 posteriorly ; the anterior coxal cavities closed ; base of the mesosternum deeply emaxginate. 



In its general shape and also in the form of the thorax Acrocyum agrees with 



Qhrysogramma, from which the closed anterior coxal cavities at once distinguish it ; the 



appendieulate claws and different shape of the mesosternum separate the genus from 



Blepharida. 



1. Acrocyum dorsalis. (Tab. XXII. fig. 23.) 



Obscure fulvous ; above flavous ; intermediate joints of the antennae piceous ; elytra with a few deep punc- 

 tures, a large rhomboidal spot on the disc, two small spots at the base, and another below the middle dark 



fulvous. 



Length 3J-4 lines. 



Head impunctate, with an oblique deep groove near the inner margin of the eyes ; carina scarcely raised, very 

 broad and joined to the epistome ; antenna? half the length of the body, the first four and the last two 

 joints flavous, the rest piceous ; thorax nearly three times as broad as long, the sides slightly narrowed at 

 the base, the anterior angles broad and slightly produced, the disc with one or two foveae at the sides 

 and another at the middle near the base, the rest of the surface impunctate, flavous ; elytra widened near 

 the middle, with a few deep punctures arranged in double interrupted short rows at the base near the 

 shoulder and at the middle near the suture, a large rhomboidal fulvous spot extends across the suture at 

 the middle, at the sides of which a small similarly coloured spot is placed, two other spots are situated 

 near the extreme base ; legs obscure fulvous, the tibiae marked with an obscure darker spot at the 

 middle. 



Hah. Mexico (coll. Jacoby). 



Two specimens of this insect are contained in my collection. The punctuation of the 

 -elytra in this species is very peculiar as there are only short rows of a few deep punc- 

 tures visible near the base and the middle, the rest of the surface being impunctate. 



2. Acrocyum sallsei. (Tab. XXII. fig. 25.) 



Testaceous ; antennae black, the basal joints testaceous ; head and thorax impunctate; elytra punctate-striate, 

 two or three basal spots, three others behind the middle and one at the apex, piceous ; femora and tibiae 

 spotted with black. 



Length 2| lines. 



Head impunctate ; the frontal tubercles small, flattened, and rather widely separated; carina absent ; apical 

 joint of the palpi piceous, elongate and pointed ; antennae two thirds the length of the body, the second 

 joint short, the third double the length of the second, the fourth slightly longer than the third, the four 

 basal joints pale fulvous, the rest black ; thorax twice as broad as long, the sides nearly straight, the 

 anterior angles slightly thickened and produced, the posterior margin sinuate in front of the scutellum, 

 the surface impunctate and with some obsolete depressions near the sides and basal margin ; scutellum 

 triangular, of moderate size ; elytra wider at the base than the thorax, convex, finely punctate-striate, 

 the punctures nearly disappearing towards the apex, two or three spots at the base, placed transversely 

 (three below the middle, obliquely situated, and a small spot near the apex), piceous ; underside tes- 

 taceous, that of the thorax with a black spot ; sides of the breast, a spot near the apices of all the femora, 

 and the base and apices of the tibiae, black ; tarsi fulvous above, the sides piceous. 



Hab. Mexico, Yolotepec (Salle). Two specimens. 



