188 MR. MARTIN JACOBY ON NEW SPECIES [Mar. 4 



Hah. Venezuela. 



This species closely resembles in coloration and pattern many 

 others of the genus, but may be distinguished by the impunctate 

 elytra, the width of their black stripes, the comparatively narrow 

 and unspotted thorax, and the rather large general size of the 

 insect. 



DiSONYCHA BREVICOLLIS, Sp. n. 



Oblong, pale testaceous, the antennae (the basal joints excepted) 

 and the tarsi black; thorax short and transverse, scarcely 

 pvmctured ; elytra closely and distinctly punctured, the sutural 

 and lateral margins and a narrow obsolete discoidal stripe obscure 

 pale fulvous. 



Length 6 millim. 



Head with a few punctures placed transversely between the 

 eyes, the frontal elevations feebly raised ; clypeus broad, tes- 

 taceous, like the labrum and the rest of the head ; eyes rather 

 elongate ; antennas robust, black, the basal three joints flavous ; 

 thorax more than twice as broad as long, the sides nearly straight, 

 the anterior angles produced obliqviely outwards, the posterior 

 angles oblique but not produced, the basal margin rounded, the 

 disT> with a few fine punctures ; elytra closely and comparatively 

 strongly punctured, the sutural and discoidal stripes very narrow 

 and obsolete, the lateral margins more broadly marked with pale 

 fulvous ; below testaceous, the tarsi black. 



Hah. Yentanas, Mexico. 



This species, which was unknown to me during the publication 

 of the Mexican Phytophaga in the ' Biologia Oentr.-Amer,,' is 

 readily distinguished by the shortness of the thorax, the more than 

 usual strong elytral punctuation, and the narrowness and faint 

 coloration of their stripes. Two specimens are in my collection. 



DiSONYCHA ANGULATO-PASCIATA, sp. n. (Plate XX. fig. 4.) 



Flavous, the head with two, the thorax with five black spots ; 

 elytra impunctate, black, a transverse medially constricted band 

 at the base, another at the middle, and a spot near the apex 

 flavous ; the apex of the femora and the tibiae and tarsi 

 black. 



Length 4 millim. 



Head with some deep punctures near the eyes, flavous, a spot on 

 the vertex and another small spot between the eyes black, the 

 latter rather large ; carina strongly raised ; antennaa robust, 

 black, the lower four joints flavous, the basal two stained with 

 black above, third and fourth joints equal ; thorax twice as broad 

 as long, the sides straight, very narrowly margined, the anterior 

 angles oblique, the disc impunctate, flavous, with five small black 

 spots (2, 3) placed transversely, the outer ones of the second row 

 the largest, the base with an obsolete transverse sulcus ; scutellum 

 black ; elytra not perceptibly punctured, with alternate transverse 

 flavous and black bands of angulate shape, the sutural and lateral 



