480 FAMILY XV. — TINGIDID^. 



members of this group have the form oval ; hood small, triangu- 

 lar, at most covering only part of the head; eyes coarsely 

 granulated; pronotal and costal margins only moderately di- 

 lated; elytra usually dimorphic in length, their texture sub- 

 coriaceous. The tribe comprises two of our eastern genera. 



KEY TO EASTERN GENERA OF TRIPE ACALYPTINI. 



a. Pronotum tricarinate, the lateral carina? sometimes faint; head with 



two diverging spines; hood small, covering the base of head, its 



apex usually bisinuate. I. Acalypta. 



aa. Pronotum with but a single median carina; head with three short 



blunt spines; hood broad, covering vertex to front of eyes. 



II. Drakella. 



I. Acalypta Westwood, 1840, 121. 



Small oval species having the antennae relatively short, basal 

 joint very stout, second much shorter, more slender, third 

 longer than the others united, fourth short, fusiform, longer 

 than first; elytra, in brachypterous form, slightly passing tip 

 of abdomen and usually meeting in a straight line along the 

 suture, in macropterous one surpassing abdomen by one-third 

 their length and overlapping. Two species are known from the 

 eastern states. 



KEY TO EASTERX SPECIES OP ACALYPTA. 



a. Costal area with two rows of cells nearly 

 throughout its length; buccula? contiguous 

 in front; third joint of antennae about 

 twice as long as fourth. 



446. THOMSONII. 



aa. Costal area with a single row of cells, ex- 

 cept near base and apex; buccula? sepa- 

 rated in front; third joint of antenna? 

 nearly four times as long as fourth. 



447. LILLIANIS. 



446 (637). Acalypta thomsonii Stal, 1873, 

 122. 

 Broadly oval, subdepressed. Dull grayish- 

 yellow; under surface and legs reddish-brown. 

 Antennae reddish-brown, joints 1 and 4 blackish, 

 joint 1 curved, much swollen, twice as long as 

 2, 3 nearly twice as long as 4. Beak reaching 

 second ventral. Pronotum with lateral carina? 

 low, distinctly divergent behind, median one percurrent, much the higher; 

 paranota with three rows of cells, two in front of middle, sides nearly 

 straight, subparallel, truncate in front. Elytra with costal margin 



