PROC. ENT. SOC. WASH., VOL. 23, NO. 3, MAR., ]<>!] 65 



black. Pronotum Mack. Hemielytra red, more or less infuseated, 

 apical margin pale. Membrane more broadly bordered with white along 

 outer lateral margin. ( = var. nichiun^lfitrii^ I'hl.i pyrrhopterus S&\. 

 - Venter either entirely black or fuscous or sometimes pale or red margined. 

 Pronotum either with posterior margin trimaculate with red or entire 

 pronotum reddish 1 1 . 



11. Venter entirely fuscous. Corium fuscous with apical angles only red. 



Membrane embrowned not margined with white tripli^aliis Barb. 



Venter black or fuscous, disk sometimes and margins pale or red. Corum 

 either fuscous, margined with red or for the most part reddish. Mem- 

 brane margined with white 12. 



12. Pronotum ochraceous-red, provided with tour short, premidian impres- 



sions. Corium ochraceous-red more or less infuscated, apical margin 

 yellow. Membrane more narrowly pale margined in brachypterous 

 forms. Pale spot at base of head often obscure ...rubricatus n. sp. 



Pronotum posteriorly trimaculate with red. Corium fuscous, costal. 

 Commissural and apical margins and apical carina of scutellum red or 

 pale. Membrane margined with white ...13. 



13. Pronotum with anterior margin red, fuscous markings form a T shaped 



fascia on each side of median line. Membrane rather narrowly and 

 evenly bordered with white. Bucculae, acetabulae, anterior and lateral 

 margins and posterior angles of prosternum broadly ochraceous-red. 



lineola Dall. 



Anterior margin of pronotum not bordered with red. Apical margin of 

 corium and membrane except at apex rather broadly bordered with 

 white. Bucculae, acetabulae, anterior margin of prosternum broadly 

 and posterior margins of all pleurae narrowly white. ( associus Uhler 

 ms.)--- ...carnosulus Van D. 



14. Membrane with a median white discoidal spot or variegated with white. 



Species pilose, small ...Lygaeospilus new subgenus. 15. 



Membrane without median white discoidal spot, entirely fuscous or pale 

 margined or rarely lacteus with fuscous veins (nigrinervis). Entirely 

 nude or only slightly pilose. Larger species, over 5 mm. 



Subgenus Melanocoryphus Stal. 16. 



15. Membrane fuscous, pale margined and provided with a rather clean cut 



transverse median white spot, often prolonged and continuous to 

 middle base of membrane. Hemielytra red often more or less infus- 

 cated. Venter entirely fuscous or sometimes margined with red. 

 ( = Lvgaeus albulus Dist. and Lygaeosoma solida Uhl.) pnsio Stal. 



Membrane fuscous, variegated with white, discoidal spot more or less 

 confused with pale variegations of surface; not pale margined, pro- 

 vided with triangular white fascia at outer basal angles. Hemielytra 

 generally entirely fuscous or fusco-rufescent, rarely pale margined. 

 Lateral margins of venter sometimes red or pale. ( = ulbitlns of various 

 authors nee Distant and obsuripennh Stal.' tripunctiitus Dall. 



16. Posterior lobe of pronotum, corium, venter except uenital segments and 



small vittae, red. Anterior margin of pronotum, clavus, posterior 

 margins of corium, bucculae, acetabulae, anterior margin ot prostern- 



