1918] 
Barber—Synoptic Keys to the Lygvide (Hemiptera) 719 
BB. Anterior lobe of pronotum three or four times as long as 
posterior lobe, with the transverse constriction between the 
lobes commonly shallow and obtuse or ill-defined. Head 
distinctly exserted; postocular space subequal to space 
between antenna and eye; most commonly not abruptly 
contracted back of eyes. Fore tibia of males provided 
with a submedian tooth. Antenna elongate; apex of head 
not attaining middle of basal segment; this segment sub- 
equal to basal segment of rostrum. Basal segment of pos- 
terior tarsus two or three times as long as second and third 
segments together. Membrane not entirely wanting in 
brachypterous forms. 
M. Anierior lobe of pronotum impunctate, de- 
marked from the posterior lobe by a transverse, 
impressed line; provided with a distinct ring- 
like collar. Basal segment of antenna with a 
few setose bristles. Ocelli absent. Fore tibial 
tooth of male at middle or posterior to the 
middle. Hind tibia provided inwardly and 
outwardly with rigid bristles. Basal segment 
of hind tarsus three times as long as second 
and third together. Larger species. 
Cnemodus H. 5S. 
MM. Anterior lobe of pronotum sparsely punctate, 
the two lobes separated by an obtuse sinus, 
not indicated by an impressed line; anterior 
margin depressed, punctate. Basal segment 
of antenna without setose bristles. Ocelli 
present. Fore tibial tooth of male anterior to 
middle. Hind tibia with a few setose bristles 
inwardly. Basal segment of posterior tarsus 
about twice the length of second and third 
together. Smaller species. (Type—P. cana- 
GENE PTOV) Oe Pseudocnemodus Barb. 
TRIBE RHYPAROCHROMINI. 
A. Anterior margin of the pronotum provided with a distinct 
ring-like coHar, behind which is a depressed series of punc- 
tures; lateral margins strongly keeled or lightly expanded 
