No. 34-] HEMIPTERA OF CONNECTICUT I ARADIDAE. 74I 



Second segment generally distinctly longer than the third, one or 

 both often not cylindrical r 



4. Lateral margins of abdomen almost entire; pronotum widest 



slightly behind middle i. aequalis 



Lateral margins strongly crenate; pronotum widest well before 

 middle 2. crenatus 



5. Third antennal segment enlarged, about one-half thicker than 



second ; length about 8 mm 3. quadrilineatus 



Third antennal segment slightly if at all thicker than second 6 



6. Antennae very robust, at the widest point most distinctly thicker 



than front femora 7 



Antennae more slender, often cylindrical, not or but slightly thicker 

 than front femora 10 



7. Pronotum with three conspicuous polished black areas behind 



middle ; hemielytra and abdomen pale 4. ornatus 



Pronotum without such areas 8 



8. Scutellum pentagonal, the sides moderately elevated; color almost 



uniform dark brown 5. robustus 



Scutellum triangular, sides higher ; coloration variegated 9 



9. Pronotum widest behind middle; sides of scutellum at middle 



lower than transverse basal elevation 6. duzeei 



Pronotum widest at middle; sides of scutellum strongly raised, 

 higher than basal elevation 7. implanus 



10. Antero-lateral margins of pronotum distinctly serrate, never deeply 



sinuate; corium (macrop.) always strongly dilated at base, 



never straight laterally 11 



Antero-lateral margins of pronotum entire, sometimes evenly gran- 

 ulate, often deeply sinuate ; corium dilated or not dilated at base 18 



11. Second antennal segment cylindrical, at least in basal half 12 



Second segment distinctly clavate, evenly enlarging from base or 



suddenly enlarged in apical third 14 



12. Pronotum widest at middle ; sides of abdomen rather strongly 



crenate 10. censors 



Pronotum widest well behind middle; sides of abdomen entire or 

 notched 13 



13. Granulation of head rough; sides of pronotum usually straight, 



oblique, with variably coarse teeth 8. proboscideus 



Granulation of head fine, smooth ; sides of pronotum slightly 

 arcuate, with very fine irregular teeth 9. basalis 



14. Length of second antennal segment about equal to distance between 



eyes 11. similis 



Length of second segment at least equal to head width including 

 one eye 15 



15. Second antennal segment not or scarcely three times as long as 



third 16 



Second segment distinctly more than three times as long as third 17 



16. Color grayish, with obscure yellowish markings and a distinct 



pattern of pale granules; sides of pronotum with a few large 



teeth anteriorly ; 13. acutus 



Color black ; sides of pronotum with numerous fine teeth 



12. shermani 



17. Second antennal segment gradually and evenly enlarged from base 



14. inornatus 

 Second segment cylindrical in basal half, strongly enlarged in 

 apical third i5- approximatus 



18. Corium strongly dilated at base, width of hemielytra at this point 



usually distinctly greater than width of pronotum 19 



Corium slightly or not dilated at base, width about equal to that 

 of pronotum 22i 



