\-ITTATE CHRYSOMELID BEETLES DISONYCHA — BLAKE 29 



Between 6 and 8 mm. in length, elongate oblong oval, somewhat 

 shiny, very faintly alutaccous; pale yellow; dark antennae, a dark 

 outer streak on tibiae, and dark tarsi; rarely with faint traces of a 

 median elytral vitta. 



Head with interocular space more than half the width of head, 

 smooth over occiput, a fovea on each side near the eye, frontal tuber- 

 cles distinct, carina rounded, head entirely pale. Antennae short, 

 robust, with the three basal joints tending to be paler and sometimes 

 the apical joint pale, the rest dark. Prothorax not twice as wide as 

 long, with arcuate sides, a slight median depression at base over the 

 scutellum, surface shiny, faintly alutaceous, impunctate, entirely pale. 

 Scutellum pale. Elytra entirely pale except in two specimens of a 

 series of 24 from Tuxtepec, Mexico, in which is discernible a faint 

 trace of a reddish brown median vitta on each elytron; surface im- 

 punctate, faintly alutaceous, somewhat shiny. Body beneath entirely 

 pale, sparsely pubescent, femora pale, tibiae with a dark outer streak, 

 tarsi dark. Length 6.3 to 8 mm.; width 3 to 4 mm. 



CoTYPEs: In BM, also in MCZ (Bowditch collection, 2), one from 

 Panistluahuaca, the other from Jalapa, Alexico, Hoge. 



Other localities: United States: Big Pine Key, Florida. Mexico: 

 Atoyac, Vera Cruz, H. H. Smith; Volcan de Colima, Jalisco, L. Con- 

 rad; Capulalpan, Cuernavaca, Morelos, H. H. Smith; Amula, Guer- 

 rero, 6,000 ft., H. H. Smith; La Venta, Guerrero, 300 ft., H. H. Smith; 

 Rio Balsas, Guerrero, Wickham; Tuxtla, Oaxaca; Tuxtepec, Oaxaca, 

 J. Camelot and M. Fraire; many specimens intercepted at the border 

 in banana trash. 



Remarks: Although this is normally an entirely pale species, there 

 are two examples in a series of typically pale specimens with a trace 

 of reddish brown median vittae. The aedeagus is very similar to 

 others of the group to which it belongs (a group which includes D. 

 leptolineata Schaeffer, D. militaris Jacoby, and D. 'peruana Jacoby, 

 and the more northern species D. abbreviata Melsheimer). 



Disonycha peruana Jacoby 



Figures 21, 22 

 Disonycha peruana Jacoby, Proc. ZooL Soc. London, vol. 1, p. 402, 1904. 



About 7.5 mm. in length, elongate oblong oval, moderately shiny, 

 faintly alutaceous; pale yellow; head wdth a dark occipital spot extend- 

 ing down front and widening over frontal tubercles; pronotum with 

 a dark margin and a lateral dark marking curving up behind the eye, 

 also a dark lateral spot and two dark spots anteriorl}^ sometimes 

 joined with an elongate median one; elytra with a narrow dark sutural 

 vitta, a median vitta, sometimes a marginal vitta joining at apex 



