738 MR. M. JACOBY ON THE [NoV. 3, 



Genus Argopistes, Motsch, 

 Argopistes unicolor, sp. nov. 



Rotuudate, convex, entirely black above ; basal joints of the 

 antennse, the knees and the tarsi fulvous ; thorax closely punctured ; 

 elytra punctate-striate, the interstices finely punctured. 



Length 1 line. 



Head with a few punctures near the inner margin of the eyes. 

 Antennae half the length of the body, the third joint very small, 

 the first three fulvous below, the others black, apex of the terminal 

 joint also fulvous. Thorax transverse, widened at the middle, the 

 basal margin sinuate at each side, the sides straight, surface very 

 finely and closely punctured. Elytra wider than the thorax, slightly 

 narrowed towards the apices, the latter rounded ; surface punctate- 

 striate, the striae rather distantly placed, and the punctures larger 

 and more distinct than those between the rows, which are closely 

 jilaced ; tarsi flavous. 



Yuyama. 



This species cannot be considered a variety of A. biplagiatus, 

 Motsch., on account of the quite different elytral punctuation, which 

 is arranged in distant rows with the interstices more finely punctured. 

 Motschulsky has described or mentioned a species (^A. Jlavitarsis) 

 which seems very closely allied to the present insect in colour ; but 

 as Motschulsky describes the antennae as testaceous and the legs as 

 brownish, and says nothing at all about the punctuation of the upper 

 surface, it is impossible to come to a definite conclusion as to the 

 possible identity of this species and A. unicolor. 



The author of the genus Argopistes has made no mention as to 

 the state of the coxal cavities nor the shape of the prosternum and 

 other parts so essential in the classification of the Halticidae. In 

 A. hiplagiatus the prosternum is of an elongate and at the same 

 time rather broad shape, longitudinally channelled and leaving the 

 coxal cavities open. The mesosternum, as in Argopus, is extremely 

 short and scarcely visible ; the first abdominal segment is furnished 

 with a longitudinal ridge at each side. The posterior femora are 

 very strongly developed, almost subhemispherical, their tibiae short, 

 robust, and distinctly widened near the apex, the latter produced in 

 an acute point and furnished at the sides with a distinct spine ; the 

 first joint of the posterior tarsi is as long as or longer than half the 

 tibiae. 



Argopistes tjndecimmaculata, sp. nov. 



Piceous below ; antennae, tibiae, and tarsi testaceous ; above 

 fulvous, closely jnmctured ; elytra with four spots before, five behind 

 the middle, and two small spots at the apices, placed transversely, 

 black. 



Length \\ line. 



Head with a few punctures and a deep transverse groove between 

 the eyes ; clypeus in shape of a triangular strongly raised ridge. 

 Antennae half the length of the body, third and fourth joints equal. 



