VITTATE CHRYSOMELID BEETLES DISONYCHA — BLAKE 47 



Remarks: Aside from the type specimen, which Dr. Rene Malaise 

 kindly sent me for examination from Stockholm, I have seen only 

 the five from the British Museum. This species is closely related to 

 D. glabrata (Fabricius), which it resembles in elytral markings and in 

 the structure of the head although in D. vittipennis there is often a 

 bluish metallic lustre and the pronotum and the body beneath are 

 usually darker. The aedeagus is shaped much as in D. glabrata, but 

 differs in the position of the orificial opening on the dorsal side. 



Disonycha tnanni, new species 



Figure 63 



From 5.5 to 6.5 mm. in length, oblong oval, shining, mirror smooth; 

 pale yellow; deeper orange on occiput; immaculate pro thorax; elytra 

 with broad dark sutm-al vitta, not united at apex with narrow marginal 

 vitta, and a broad median vitta; antennae unusually long and slender; 

 body beneath with prosternum and abdomen pale, breast and legs 

 tending to be mostly dark. 



Head deep orange above down to tubercles, without dark occipital 

 spot, pale, shining, mirror smooth except for large fovea or circle of 

 punctures near eye, lower front long and narrow, paler frontal carina 

 rounded, a little produced, tubercles well marked, interocular space 

 scarcely half width of head, mouthparts brownish, not at all piceous. 

 Antennae long and slender but not extending half way down elytra, 

 brown with the basal joints pale edged and frequently the two distal 

 joints paler. Prothorax about twice as wide as long, with wide anterior 

 angles and nearly straight sides, not very convex and with a slight 

 basal depression, mirror smooth and without definite spotting although 

 in some specimens a faintly deeper coloring suggesting two lateral 

 spots and an elongate median one. Elytra mirror smooth, a broad 

 dark sutural vitta not uniting at apex with the narrow marginal vitta, 

 a broad median vitta. Epipleura dark. Body beneath shining, 

 finely pubescent, the prosternum pale, abdomen mostly pale, usually 

 the breast and legs dark, sometimes the middle of the breast and 

 coxae pale. Length 5.5 to 6.5 mm., width 2.8 to 3 mm. 



Type: Male, USNM 61818, and one para type, MCZ, from 

 Tumupasa, Bolivia, Mulford Biological Expedition 1921-22, W. R. 

 Lopez and W. M. Mann, collectors. 



Other localities: Bolivia: Isiamas, one specimen, W. M. Mann, 

 December; Rurrenabaque, Rio Beni, one specimen, W. M. Mann, 

 October, Mulford Biological Expedition 1921-22. 



Remarks: This species is somewhat like D. glabrata (Fabricius) 

 except that it has an entirely pale head and dark legs. The aedeagus is 

 not at all like that of D. glabrata or, in fact, of any other species. 



