June, 1921.J Barber: Revision of Gems Ligyrocoris Stae. 1U3 



12. Fore femora with only an inner scries of sp.'nes. Head and pronotum 



provided with long setose hairs. Second segm -nt of antenna over twice 

 as long as basal segment. Basal segment of posterior tarsus over twice 

 as long as second and third together. Membrane much variegated with 



pale C Southern U. S. ) abdominalis Guer. 



— . Fore femora with inner series of strong spines and apical outer series of 

 small spines. Head and pronotum with shorter setose hairs. Second 

 segment of antenna about twice as long as basal. Basal segment of 

 posterior tarsus not twice as long as second and third together. Mem- 

 brane with interior veins pale (Mexico; Florida) multispinus Stil. 



13. Eyes not set midway in the head; anteocijlar distance to aju x of anten- 



niferous tubercles longer than or subequal to postocular distance. .An- 

 terior lobe of pronotum not narrow, much more than half the diameter 

 of the posterior lobe. Basal segment of antenna short, about one half 

 the length of basal segment of rostrum. Head, pronotum and anterior 

 femora sparsely or scarcely setose. Fore femora armed with a few 



spines towards apex. Membrane not decolorous 14 



— . Eyes set about midway in the head, postocular distance a little longer than 

 anteocular distance to apex of antenniferous tubercles. .Anterior lobe 

 of pronotum very narrow, narrower than diameter of head across eyes, 

 nearly one half the diameter of posterior lobe. Basal segment of an- 

 tenna more than half as long as the basal segment of rostrum. Head, 

 pronotum and anterior femora rather densely long setose. Fore femora 

 armed with a row of strong spines for nearly its entire length. Mem- 

 brane nearly decolorous (Southwestern U. S.) setosus Stal. 



14. .Anterior lobe of pronotum piceous, postmedian transverse fascia always 



well marked. Fore femora armed on the outer half with two or three 

 strong spines, preceding and following the preapical one with two or 



three tine small teeth 15 



— . Anterior lobe of pronotum not piceous. either grayish or partially infus- 

 cated. Fascia of corium sometimes reduced or wanting. Fore femora 

 provided with one or two preapical minute spines sometimes reduced 

 to mere tubercles (Southwest U. S.) delitus Distant. 



15. Anterior lobe of pronotum and fore femora nearly or ciuite devoid of 



setose hairs. Diameter of pronotum at collar subequal to diameter at 

 constriction between the two lobes. Markings of corium fuscous or 

 piceous with the postmedian fascia extended entirely to the edge of the 

 hemielytra. Membrane most commonly not extended to apex of the 



abdomen, apex triangularly pale (Northern U. S.) sylvestris Linn. 



— . .Anterior lobe of pronotum and fore femora sparsely setose. Diameter of 

 pronotum at collar plainly less than at constriction between the two 

 lobes. Markings of the corium castaneous or ferrugineous with the 

 postmedian fascia generally not quite reaching edge of hemielytra. 

 Membrane commonly produced to end of abdomen, veins for the most 

 part pale (Northern U. S.) diffusus I'hl. 



