THE LEAF BEETLES. 



1129 



12083 (G<>73). PACHYBKACHYS TIMKKXS Melsh., Proc. Phil. Acad. Nat. Sci.. 



III. 1847, 171'. 



Short, subcylindrical, less robust. Head yellow; ver- 

 tex, and often a spot on front, black; color of thorax 

 given in key; elytra yellow, with a large, common, black 

 cruciform spot on disk, this wider at base, much nar- 

 rowed at middle, and again widened on apical third, so 

 as to form a common crossbar; each also with narrow 

 marginal line and humeral spot, black; under surface 

 black; antenna 1 and legs yellow, the hind thighs often 

 with black spot. Thorax sparsely and rather coarsely 

 punctured. Elytra with well defined though sinuous rows 

 of coarse punctures. Length 2-3 mm. (Fig. 4S7. ) 



Throughout the State; common. May 'Jo-August 2. Occurs on 

 foliage of hickory and dm and on that of many herbs along road- 

 sides. The color varies greatly. The yellow is sometimes pale, 

 sometimes dirty brownish in hue; the dark spots vary from black to 

 dull brown. The median spot of thorax is sometimes V-shaped, 

 again oblong, and rarely more or less merged with those on sides; 

 while the elytra may be black with only a narrow median line of 

 yellow, or yellow with only the discal spot and three spots on side; 

 black. The sparsely punctured thorax and yellow lo;>s will reM'e to 

 distinguish it from sinuiuirinx and other closely allied forms. 



l'OS4 (r.CiCO). PAciiYP.'JAciiYS AI-.IIO.M i. \AI.IS Say, Journ. Phil. Acad. Nat. 



Sci.. III. 1S24, 437; ibid. II. 2e,3. 



Form and size of the preceding. Head and thorax dull grayish-yellow, 

 irregularly clouded with markings formed by black punctures. Elytral in- 

 tervals grayish-white and prominent on the sides, the rows of punctures 

 black; the latter confused and intervals much broken on disk near suture; 

 under surface black; sides of abdomen and pygidium marked with paler; 

 legs pale, the femora with a dark spot on middle. Thorax rather coarsely 

 and irregularly punctate, the raised, smooth, gray or dull yellow spaces 

 varying much in size and shape. Length I'-.", mm. 



Northern third of State, frequent; not taken south of Marshall 

 rnd Koscinsko counties. May 12--) tine :>(). Taken by sweephr-; 

 herbage in low, moist places. 



I'OS.'t (C.r.'.tO). I'ACHYitKACHYs ATOMAKii s Melsli., Proc. Phil. Acad. Nat. 



Sci.. Ill, 1847, 170. 



Subcylindrical. robust. Black, mottled with whitish ; front mostly white : 

 antenna' fuscous, the three basal joints paler; thorax black, with the nar- 

 row margins and three or four small, scattered spots, whitish; elytra with 

 numerous elongate spaces of the broken intervals whitish; under surface 

 black, the legs varied with white. Length 2.5-3 mm. 



Lake, Marshall and St. Joseph counties: scarce, May 29- 

 June 11. 



