398 FAMILY XI. — LYG^EIDjE. 



gin of pronotum ; antennae slender, longer than head and pro- 

 notum united, basal joint shortest, surpassing tip of tylus, sec- 

 ond more slender, slightly longer than the others ; beak reach- 

 ing middle coxae, its first joint not reaching base of head ; pro- 

 notum strongly constricted, front lobe subcylindrical, longer 

 than hind one, scarcely longer than wide, its collar distinct ; 

 scutellum usually elongate-triangular, its apex acute ; elytra 

 as wide as abdomen, usually entire and reaching or slightly sur- 

 passing its tip, costal margin straight, feebly reflexed ; front 

 femora strongly swollen, armed beneath with one or two rows 

 of spines or teeth ; tarsi with basal joint about twice as long 

 as the others united. 



Our species of the genus have been mostly treated under the 

 name Pamera Say, which Van Duzee (1914, 382) showed was 

 preoccupied. Except in its members being narrower, less ro- 

 bust, and lacking the strigose areas of ventrals, the genus 

 scarcely differs from Ligyrocoris. Ten species have in the past 

 been presumably recorded from our territory, but two of them, 

 vicina (Dall.) and dallasi (Dist.), are at present unknown and 

 are not included in the following key. Both were recorded by 

 Dallas from "North America" without definite locality. 



KEY TO EASTERN SPECIES OF ORTH^EA. 



a. Corium with costal area, except at apex, wholly pale, not inter- 

 rupted by a dark bar behind the middle. 

 &. Corium without a conspicuous oval pale spot near inner apical 

 angle; front lobe of pronotum about twice as long as hind one; 

 head rather strongly exserted ; form very elongate ; length 5.7 

 or more mm. (Subgenus Paromius Fieb.). 340. longulus. 



bb. Corium with a small but conspicuous oval pale spot near inner 

 apical angle; front lobe of pronotum not over one and one-half 

 times as long as hind one; head much less exserted; form much 

 less elongate; length less than 5 mm. (Subgenus Orthsea Dall.). 

 r. Hind margin of corium wholly black or piceous; femora wholly 

 pale. 341. vincta. 



cc. Hind margin of corium pale; femora, at least the hind ones, with 

 dark markings. 

 d. Pronotum moderately constricted slightly behind the middle, the 

 front lobe with sides but slightly curved, convergent; front 

 femora pale, hind ones with a preapical dark ring. 



342. FRACTICOLLIS. 



dd. Pronotum sharply and strongly constricted well behind the mid- 

 dle, the sides of front lobe distinctly curved. 

 e. Front lobe of pronotum transverse, widest at middle and with 

 fine suberect pubescence; pale markings of upper surface in- 

 distinct or wanting; front femora reddish-brown. 



343. LURIDA. 



