1918] 
BB. 
Barber—Synoptic Keys to the Lygaide (Hemiptera) 85 
margin of pronotum. Lamellar lateral expansion very dis- 
tinct on both lobes. Antenne rather strongly pilose. 
Mesosternum not longitudinally suleate. 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. 
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. Antenne not 
pilose. Mesosternum strongly suleate. 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. Antenne very long, 
slender and nude; first segment as long cr a 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 
