1126 FAMILY LIII. — CHRYSOMELIDiE. 



./'. Thorax black with margins and three discal spots yellow; 



larger, 3.5-4 nmi. 2082. m-nigbtjm. 



./'./'. Thorax yellow with either a Y-shaped or an entire oblong 

 median spot and a smaller rounded one each side, black ; 

 smaller, not oyer 3 mm. 2083. tridexs. 



dd. Colors of upper surface irregularly mottled. 



A - . Elytra with well defined though sinuous rows of punctures over 

 most of the surface. 

 /. Outer three or four elytra! intervals entire, whitish, in strong 

 contrast with the rows of black punctures ; thoracic punctures 

 each side of middle separated by more than their own diame- 

 ters, their intervals not alutaceous. 20S4. abdomixaus. 

 II. Outer intervals broken into oblong whitish spots ; thoracic punc- 

 tures crowded, their intervals finely alutaceous. 



2085. ATOMAEIUS. 



JcJc. Elytral punctures mostly confused, complete stria? visible only on 

 the sides. 



m. Sides of thorax strongly rounded and incurved near the base, the 

 hind angles obtusely rounded ; prosternum deeply concave 

 lengthwise; upper surface densely and very strongly punctured. 

 h. Thorax usually with margins and median line red; elytra mot- 

 tled with small, white dots, the punctures confused over most 

 of the surface; legs black with yellow spots; size 3.2-4 mm. 



20S6. LURIDUS. 



////. Thorax black with narrow margins yellow, its punctures fine 

 and dense ; legs and last ventral wholly yellow ; smaller, 

 2.5 mm. 20S7. sticticus. 



mm. Sides of thorax obliquely, broadly rounded or straight, not in- 

 curved behind: prosternum flat, scarcely concave, not narrower 

 behind. 



o. Punctures of elytra uniform in size; two striae visible at sides: 

 dull clay yellow clouded with brown. 2088. hepaticvs. 



oo. Punctures of elytra more or less irregular ; stria? visible at 

 sides and behind. 

 p. Colors red and black. 



q. Elytra black with a broad, irregular band from the side 

 almost to suture, red. 20S9. subfasciatus. 



qq. Elytra with broader and paler red band extending from 

 side to side. 2089a. var. dilatatus. 



pp. Colors yellow, brown or black, mottled. 



r. Upper surface black with scattered white or yellow mark- 

 ings. 



s. Thoracic punctures each side of middle coarse, separated 

 by more than their diameters, their intervals distinctly 

 alutaceous; legs wholly pale. 2090. peccaxs. 



- ss. Thoracic punctures crowded, their intervals not or very 

 finely alutaceous. 

 /. Punctures of thorax coarser and more uneven: elytra 

 without an isolated round white spot at middle near 

 suture. 



