698 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



5. Sternal ridges not connected; hemielytra and paranota widely 



explanate or narrow; paranota produced or angulate anterior 



exteriorly when explanate 6 



Sternal ridges connected by a transverse carina between meso- and 

 meta-sternum ; hemielytra and paranota widely explanate; 

 paranota not produced or angulate anteriorly Gargaphia, p. 704 



6. Hemielytra widely explanate; discal elevation present; pronotal 



hood covering head 7 



Hemielytra explanate or narrow; discal elevation absent; hood 



not covering entire head 9 



7. Lateral carinae of pronotum abbreviated, not reaching hood 8 



Lateral carinae extending forward to hood Leptobyrsa, p. 703 



8. Hemielytra suddenly constricted at base; lateral margins approxi- 



mately parallel Corythucha, p. 699 



Hemielytra gradually widening from base Stephanitis, p. 703 



9. Areas of hemielytra strongly delimited by distinctly costate main 



veins ; antennae smaller in proportion ; form not or slightly con- 

 vex ; surface dull 10 



Areas not strongly delimited ; antennae very large ; form strongly 

 convex ; surface shining Alveotingis, p. 707 



10. Subcostal area of hemieMra in large part with three or more rows 



of areoles, sometimes confused; anterior margin of pronotum 



not concavely arcuate 11 



Subcostal area with two distinct rows of areoles 13 



11. Hemielytra not explanate, extending but little beyond apex of 



abdomen, areoles small and more nearly equal ; discoidal area 

 usually extending beyond middle of hemielytra; first antennal 



segment shorter . 12 



Hemielytra explanate, membranous, extending much beyond apex 

 of abdomen, some of the areoles large ; discoidal area not extend- 

 ing beyond middle of hemielytra, its inner margin curved; first 



antennal segment more than twice as long as second 



Gelchossa, p. 704 



12. Paranota wide, reflexed against dorsal surface of pronotum 



Physatocheila, p. 705 

 Paranota very narrow, cariniform, not reflexed . . Leptoypha, p. 706 



13. Third antennal segment cylindrical, more or less enlargedat apex; 



dorsal surface flat; apices of hemielytra divaricate in short- 

 winged form Melanorhopala, p. 706 



Third antennal segment rather evenly clavate from near base; 

 dorsal surface moderately convex; apices of hemielytra not 

 divaricate in short-winged form Hesperotingis, p. 707 



Acalypta Westwood. 



Small ovate compact species, having the vertex with two diverg- 

 ing spines ; eyes coarsely granulated ; basal segment of antennae 

 very thick ; second much smaller, third slender, fourth short, fusi- 

 form, thicker than third ; pronotum with three carinae ; pronotal 

 and hemielytral margins not widely dilated. Species dimorphic. 



Key to Species. 



Costal area largely uniseriate lillianis 



Costal area largely biseriate thomsonii. 



A. lillianis Bueno. 



Bull. Brook. Ent. Soc, xi, 39, 1916. 



