VITTATE CHRYSOMELID BEETLES DISONYCHA — BLAKE 9 



37. Prothorax with the middle spot wide 38 



Pro thorax with the middle spot narrow 39 



38. Small (5-6.5 mm.), body beneath pale with dark legs (Argentina) 



prolixa Harold (p. 66) 

 Larger (6.5-7 mm.), body beneath often dark with pale femora (Colombia) 



cordigera, new species (p. 50) 



39. Lateral pronotal spots stretched out in a narrow neck [toward] the median 



spot (Argentina, Paraguay, Chile, Brazil, Uruguay) 



copulala (Germar) (p. 67) 



Lateral pronotal spots not stretched out towards median spot in a narrow 



neck 40 



40. Legs entirely dark (Paraguay, Brazil). . . . plaiimanni Costa Lima (p. 68) 

 Legs not entirely dark (New York to Argentina) 



glabrata (Fabricius) (p. 43) 



Disonycha pensylvanica (Illiger) 

 Figure 2 



Haltica pensylvanica lUiger, Mag. Insekt., vol. 6, p. 146, 1807. 

 tGalleruca sexUneata Olivier, Entomologie, vol. 6, p. 642, 1808 (Bengal). 

 Disonycha pensylvania Sturm, Catalogue, p. 283, 1843. — Blake, Bull. Brooklyn 



Ent. Soc, vol. 25, p. 210, 1930. 

 Disonycha pennsylvanica Crotch, Proc. Acad. Nat. Sci. Philadelphia, vol. 25, p. 64, 



1873.— Horn, Trans. Amer. Ent. Soc, vol. 16, p. 202, 1889 (in part). 

 Disonycha pennsylvanica var. parva Blatchley, Journ. New York Ent. Soc, vol. 



29, p. 16, 1922 (Knox County, Indiana). 

 Disonycha pensylvanica Blake, Proc. U. S. Nat. Mus., vol. 82, pp. 12, 13, 1933. 



Between 5 and 6 mm. in length, elongate oblong oval, not very 

 convex, shining, although faintly alutaceous; head, antennae, under- 

 surface except pale tip of abdomen, and legs dark; prothorax with a 

 broad dark spot or band; elytra with moderately wide sutural and 

 submarginal vittae not quite uniting at apex or sometimes broadly 

 uniting, and median vitta having a costa down it, sometimes in 

 female with several costae. 



Head dark, except for the pale area about antennal sockets, short 

 and broad, the interocular space about half the width of head, occiput 

 faintly alutaceous and smooth, with a cluster of coarse punctures 

 about fovea on either side; carina short, acute and little produced. 

 Antennae entirely dark, rather long. Prothorax twice as wide as 

 long with nearly straight sides, and faintly depressed along base; 

 shining although faintly alutaceous and finely and not densely punc- 

 tate. Elytra not very convex, with a faint median costa in male, 

 several in female, shiny, feebly alutaceous and with fine punctures, 

 the dark sutural and submarginal vittae usually uniting at apex, 

 sometimes not, median vitta moderately wide, epipleura with dark 

 inner edge. Body beneath and legs entirely dark except the tip of 

 abdomen and the sides of prosternum. Length 5 to 6 mm,, width 

 2.8 to 3 mm. 



319188—55 2 



