VITTATE CHRYSOMELID BEETLES DISONYCHA — BLAKE 33 



Remarks: This is very close to Disonycha quinquelineata (Latreille) 

 and only the difference in the aedeagus makes me regard it as separ- 

 able. There are three minor differences — the tibiae and tarsi are 

 deep reddish brown instead of being pale yellow, and there is a 

 difference in the shape of the anterior angles of the prothorax, these 

 being smaller and less deeply notched than in D. quinquelineata. The 

 third small difference is in the relative length of the third and fourth 

 antennal joints. In the Jalapa specimens the fourth joint is not 

 twice as long as the third, whereas in the case of D. quinquelineata, 

 the third joint is shorter and about half as long as the fourth. In 

 general the Jalapa specimens are not quite so large. Possibly this is 

 the same as D. stenosticha Schaeffer described from BrowTisville, Texas. 

 The basal angles of the prothorax do not appear as oblique as in that 

 species. But since D. stenosticha is known from only two specimens, 

 both females, this specific question cannot be settled at this time. 



Disonycha colombiana, new species 



Figure 27 



Between 7 and 8 mm. in length, elongate oblong oval, shining, 

 elytra very faintly punctate; prothorax short, broad, and with nearly 

 straight sides and wdde anterior angles; pale yellow; head and prothorax 

 without dark markings ; elytra with very narrow sutural, median, and 

 submarginal reddish brown vittae, not joined at apex; body beneath 

 entirely pale, anterior tibiae with a dark streak. 



Head entirely pale, polished over occiput, a coarse puncture or two 

 on either side near eye, frontal tubercles outlined, carina rather narrow 

 and short, although the lower front is long, with excavations under 

 antennal sockets on each side; interocular space approximately half 

 width of head. Antennae long, slender, the fourth joint not quite 

 twice as long as third; basal joints paler, rest of joints reddish brown. 

 Prothorax twice as wide as long, with nearly straight sides and wide 

 anterior angles, a slight callosity on each side near base and a slight 

 basal depression over the scutellum; surface shiny, nearly impunctate, 

 pale yellow, one of the two specimens with a faint trace of pronotal 

 spotting. Scutellum pale. Elytra broad and widely margined, shin- 

 ing, very faintly punctate, pale yellow with narrow reddish brown 

 sutural, median and submarginal vittae not joined at apex. Epipleura 

 pale. Body beneath entirely pale, the anterior tibiae with a dark 

 outer streak, tarsal joints reddish brown. Length 7.3 to 8 mm., 

 width 4 mm. 



Type: Female, MCZ 29038, and paratype, female, USNM 61813, 

 from Aracataca, Magdalena Province, Colombia, P. J. Darlington. 



319188—55 5 



