360 



FAMILY XI. — LYG^ID^. 



KEY TO EASTERN SPECIES OF CYMUS. 



a. Basal joint of antennae not surpassing tip of tylus, less than half the 

 length of second. 

 b. Front portion of pronotum without a distinct median longitudinal 

 smooth line; second antennal much shorter than third; head about 

 as long as wide, first antennal not reaching its apex. 



297. ANGUSTATUS. 



bb. Front of pronotum with a pale, elevated, smooth median line; sec- 

 ond and third joints of antennae subequal in length; head wider 

 than long. 

 c. Width of front margin of pronotum greater than that of space 

 between eyes; fourth antennal distinctly shorter than third; 

 larger, length, 4.5 or more mm. 

 d. Pronotum but slightly wider at base than long, its sides evidently 

 converging from base to apex, its disk finely, unevenly and 

 shallowly punctate; color pale straw-yellow; form slender. 



298. LURIDUS. 

 dd. Pronotum about one-third wider at base than long, subquadrate, 

 its sides very slightly if at all converging toward apex and 

 disk coarsely, evenly and deeply punctate; color pale to dark 

 reddish-brown; form more robust. 299. robustus. 



cc. Width of front margin of pronotum subequal to that of space be- 

 tween eyes ; fourth antennal scarcely shorter than third ; small- 

 er, not over 3.7 mm. 300. discors. 

 (ki. Basal joint of antennae distinctly surpassing tip of tylus, usually 

 half or more than half the length of second; front portion of pro- 

 notum with a pale smooth elevated line. 

 e. Head and basal antennal in great part black; third antennal one- 

 half or more longer than second ; length less than 3.5 mm. 



301. BELLUS. 



ee. Head and basal antennal wholly pale; third antennal more than 

 twice the length of second; length, 4 — 4.5 mm. 302. virescens. 



297 (484). Cymus angustatus Stal, 1874, 126. 



Elongate-oval. Above pale brownish-yellow; head, pronotum and 

 scutellum somewhat darker, often clouded with 

 fuscous; extreme tips of clavus and corium, and 

 fourth antennal except base, piceous or fuscous; be- 

 neath reddish-brown, the legs paler. Pronotum sub- 

 cylindrical, its basal portion strongly convex, side 

 margins obtuse or broadly rounded, front margin 

 as wide as space between eyes. Other characters as 

 in key. Length, 3.8—4.2 mm. (Fig. 76). 



Common in northern Indiana, less so in 

 the southern counties ; occurs throughout 

 the year. Hibernates beneath logs and other 

 cover and in spring and summer taken by- 

 sweeping vegetation growing in moist or 

 alluvial soil along lakes and streams, or the 

 borders of woodland. Sherborn, Mass., 



Fig. 76, X 10. 

 (Original) . 



