364 FAMILY XI. — LYG^ID^. 



are recognized by Van Duzee from North America, five of 

 which occur in our territory, while four others are herewith in- 

 cluded. 



KEY TO EASTERN SPECIES OF ISCHNODEMUS. 



a. Beak not or very slightly passing base of prosternum. 

 b. Membrane wholly pale with fuscous veins; elytra without a broad 

 black bar across basal third. 

 c. Pronotum not or very feebly constricted at basal third and with- 

 out a distinct median groove; antennas slender, the basal joint 

 distinctly longer than thick ; abdomen blackish. 

 d. Third antennal scarcely shorter than second ; discal area of 

 corium with one or two fuscous veins ; second interior vein of 

 membrane but feebly curved inward at its basal third. 

 e. Antenna? wholly black; basal lobe of pronotum not punctate. 



303. FALICUS. 



ee. Basal half or more of antenna? reddish-brown; basal lobe of pro- 

 notum punctate. 304. intermedius. 

 dd. Third antennal distinctly shorter than second; discal area of 

 corium wholly pale; second interior vein of membrane sharply 

 angularly bent inward at its basal third almost to first vein. 



305. RUFIPES. 

 cc. Pronotum distinctly and widely constricted at basal third, its 

 front portion with a broad shallow median longitudinal groove; 

 antennae stout, the basal joint oval, nearly as thick as long; ab- 

 domen pale reddish-brown. 306. robustus. 

 bb. Membrane with apical two-thirds shining black; elytra with a 

 broad black bar across basal third. 307. atramedius. 

 act. Beak reaching to or behind the middle of mesosternum. 



/. Basal half or more of antennae pale; head and front portion 

 of pronotum black; osteolar duct blackish or obscurely pale. 

 g. Pronotum without a black velvety bar across the base and 

 with at least the basal margin pale; antennae with two api- 

 cal joints wholly or in part dark; elytra in brachypterous 

 form with dark veins; length 5 or more mm. 

 h. Pronotum with basal fifth or less pale; antennae stout, basal 

 joint slightly longer than thick; color black, legs dark 

 reddish-brown. 308. lobatus. 



hh. Pronotum with basal fourth or more pale; antennae more 

 slender, basal joint much longer than thick; legs pale red- 

 dish-brown. 309. SLOSSONI. 

 gg. Pronotum wholly blackish and with a black velvety bar 

 across the base; antennae with only the apical joint dark; 

 elytra, brachypterous form, small white pads without dark 

 veins, but with an oblique black spot behind middle; length 

 less than 3.5 mm. 310. minutus. 

 //. Antennae wholly blackish; head and pronotum dark brown or 

 paler; osteolar duct pale. 311. badius. 



