1918] Barber — Synoptic Keys to the Lygwidoe (Hemiptera) 85 



margin of pronotum. Lamellar lateral expansion very dis- 

 tinct on both lobes. Antennae rather strongly pilose. 

 Mesosternum not longitudinally sulcate. Basal segment of 

 posterior tarsus distinctly longer than second and third seg- 

 ments together. Third ventral suture of abdomen strongly 

 curved anteriorly and not reaching lateral margin. 



Drymus Fieb. 

 BB. Body much flattened. Lateral margins of pronotum 

 strongly converging anteriorly, anterior angles gently 

 rounded. Width of head across eyes subequal to width 

 across rounded submargin of pronotum. Lamellar lateral 

 expansion less obvious on the anterior lobe. Antennae not 

 pilose. Mesosternum strongly sulcate. Basal segment of 

 posterior tarsus subequal to second and third segments 

 together. Third ventral suture of abdomen almost 

 straight and reaching the lateral margin . . Gastrodes Westw. 

 AA. Pronotum with the anterior lobe impunctate or obscurely 

 punctate. Anterior tibia of males not so strongly curved or 

 bent or abruptly expanded at apex. Fourth ventral abdom- 

 inal segment with or without the third subapical glandular 

 opaque spot. 

 C. Dorsal parts dull. Anterior margin of pronotum depressed 

 and commonly pale, limited behind by a row of punctures ; 

 lateral lamellar expansion noticeably wider between the 

 two lobes, for the most part commonly pale. Fourth ven- 

 tral abdominal segment without the third subapical spot. 

 Hind tibia without long rigid bristles; at most with a few 

 short setose bristles or pilose. 

 D. Pronotum much longer than wide; anterior lobe subquad- 

 rate and disk obsoletely punctate. Antennae very long, 

 slender and nude; first segment as long era little longer 

 than the head, longer than first segment of r strum, apex 

 of head not reaching middle point; third segment longer 

 than fourth. Head submerged to the eyes; head across 

 eyes as wide as anterior margin of pronotum. Lateral 

 margins of pronotum and corium widely lamellarly ex- 

 panded and broadly reflexed. Corium dorsally flattened 

 not transversely convex. Scutellum longer than wide. 

 Clavus distinctly widened posteriorly, rather closely and 



