1918] Barber — Synoptic Keys to the Lygwida (Hemiptera) 87 



F. The lateral edge of the pronotum concolorous, not 

 definitely demarked or bordered by an impressed line, 

 much compressed or acute and beneath strongly im- 

 pressed within the lateral margin of the propleura; 

 the lateral margins nearly straight and converging 

 anteriorly; anterior and posterior margins straight. 

 Width of head across eyes a little narrower than across 

 anterior sub margin of the pronotum. Basal segment 

 of rostrum near'y equal to basal segment of antenna. 

 Dorsal parts pilose. 

 G. Fore femon provided with a few tubercles and nu- 

 merous long setse. Antennae somewhat incrassate. 

 Basal segment of posterior tarsus nearly twice as long 

 as second and third together. Hind tibia with strong 

 bristles. Surface not strongly shining. 



Cist alia Stal. 

 GG. Fore femorse provided with several minute preapical 

 teeth with or without setae. Antennae not incrassate 

 and pilose. Basal segment of posterior tarsus a little 

 longer than second and third segments together, but 

 never twice as long. Hind tibia with short fine bristles. 

 H. Pronotum very transverse, nearly twice as wide as 

 long, posterior lobe sparsely punctate. Clavus 

 deflected to corium and provided with three regular 

 rows of punctures. Corium finely punctate. An- 

 tennae set close to the eyes, antenniferous tubercles 

 less than one-half the length of the eyes. Membrane 

 reaching apex of abdomen. Only macropterous 

 forms known to me. (Type — Petissius diver sus 



Dist.) Valtissius Barb. 



HH. Pronotum more lightly transverse, almost impunc- 

 tate except behind anterior margin. Clavus almost 

 flat, with four series of punctures. Corium sparsely 

 punctate. Antennae further removed from the eyes, 

 antenniferous tubercles only a little shorter than the 

 eyes. Membrane abbreviated. Dorsal parts very 

 shining. Only brachypterous fonrs known to me. 

 (Genus Rhaptus Stal?) Xestocoris Van D. 



