165 
Key To FAMILIES 
NYMPHS 
Hind tibiae nearly glabrous or with soft pale hairs, sometimes with short black 
spinulose hairs as in Huschistus; plantar surface of first tarsal segment rather 
densely hairy except on basal middle; dorsal abdominal sutures considerably 
distorted by scent-glands, terminal hooks of glands usually well marked; two 
spiracular setae transversely placed (rarely obliquely), behind the spiracle... 
EPS Ota Dect rata et cks ea Marat Sues CM aald aioinya Weeds aieherese sre dasa th @ PENTATOMIDAE. 
Hind tibiae with distinct and rather long spinules, and some inconspicuous 
hairs; plantar surface of first tarsal segment smooth and shining, with a few 
sparse hairs (Cydninae) or a row each side (Thyreocorinae); dorsal abdom- 
inal sutures easily traced, not greatly distorted, terminal hooks of glands but 
little developed; slit on anterior scent-gland not longer than slits of the suc- 
CLISTUNGES [AVE aYs ep Re ec on aecereer ig. CPt LO A OCR ACEO hes cee KCC CER CYDNIDAE. 
IMAGINES 
Tibiae not distinctly spinose, [if with short setulae the dorsal surface is longi- 
tudinally concave and has a slender ridge on each side;] more than five dorsal 
segments in addition to the genital series; caecal pockets, when present, in 
four rows, cubitus of hind wing not modified.................. PENTATOMIDAE. 
Tibiae evidently spinose, [the dorsal surface rounded or angular, not concaye; J 
only five dorsals in addition to the genital segments; caecal pockets in two 
rows; cubitus of hind wing bent and finely transversely ridged near base..... 
Pera esi deckc disc nacsro notaries cence ect olne rupaher eins lala: savaged sida, Siwraitarens ave a apie CYDNIDAE. 
Family PENTATOMIDAE 
Key TO SUBFAMILIES 
NYMPHS 
Anterior scent-gland with slit evidently longer than those of the succeeding 
glands, the terminal pores apparently functional.............. SCUTELLERINAE. 
Anterior scent-s;land feebly developed, as long as the next or slightly shorter; in 
Murgantia somewhat longer, since the next is unusually short. 
Jugal margin in front of eye with evident spine; prothoracic margin with 
conspicuous large subspinose teeth perpendicular to the margin (Brochy- 
ERLTT SRA Oy pone ee tUR indore rere es mai er a UipMan eva oat Gur @hu loll ere elatelis cidade a ave HALYDINAE. 
Jugal margin in front of eye with rounded tooth or unarmed; prothoracic 
margin finely serrate or entire. 
Rostrum slender beyond the basal part of first segment; second segment 
more than twice as long as its narrowest part, seen from below.......... 
BPMN area aa et tote tantarietn Rance hy eifeyecENh Gris’ sisi opine) witeler alls. olelausvayin say's ates dts ie PENTATOMINAE, 
Rostrum as seen from below very thick, of nearly equal breadth through- 
out; second segment about twice as long as broad.............- ASOPINAE. 
IMAGINES 
Seutellum U-shaped, very large, nearly or quite reaching tip of abdomen; frena 
wanting or extremely short, less than 1/5 length of scutellum; opaque part 
of corium greatly narrowed. 
