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bb. Femora entirely black. 
c. Coxae and trochanters black; abdomen without black :&ascia 
3. mactans Stal 
cc. Coxae and trochanters rufous. 
d. Head with two longitudinal black stripes on the post-ocular 
portion i.'bilo'bus Say 
dd. Head entirely stramineous 5. longipes Linn. 
aa. Entire body, antennae, rostrum and legs, pallid; body narrow, 
b. Head elongate, gradually narrowed toward base. 
c. Legs speckled or annulated with black Q.pictipes Champ. 
cc. Legs entirely pale.. l.cervicalis Stal 
bb. Head comparatively short, strongly narrowed toward the base 
8. pallens H.-Sch. 
Subgenus Diplodus Am. et S. 
Lateral angles of pronotum armed with a spine or tooth; disc unarmed, 
a. Head rufous or sanguineous; pronotum with one or two transverse black 
fascia; legs partly testaceous or sanguineous; body more or less robust. 
b. Lateral spines of pronotum sharp; femora testaceous at base 
9. ruficeps Stal 
bb. Lateral spines of pronotum very short or indistinct; femora at base 
and abdomen more or less sanguineous 10. grassans Stal 
aa. Head testaceous or stramineous, usually with darker markings. 
b. Anterior lobe of pronotum with numerous black spots on the disc, 
separated by sinuous line of pubescence; size large 11. j anus Stal 
bb. Anterior lobe of the pronotum without black spots on the disc. 
c. Pronotum sulcate down center, from apex to middle of posterior 
lobe. 
d. Body robust, four or five times as long as wide; anterior femora 
incrassate; all femora thickened; transverse black fascia on 
the abdominal segments; joint 1 of antennae as long as head 
and thorax together 12. sulcicollis Champ. 
dd. Femora slender, anterior not incrassate; posterior lobe of 
pronotum with a shallow lateral sulcus on» each side, 
e. Body slender, over six times as long as wfide; joint 1 of 
antennae as long as head and pronotum together; a Cuban 
species 13. subimpressus Stal 
ee. Body slender; joint 1 of antennae shorter than head and 
pronotum together; a Californian species.. 14 renardii KoL 
cc. Pronotum with anterior lobe only sulcate; body moderately broad 
or narrow; head, pronotum and scutellum testaceous, fuscous or 
nigrofuscous; femora sometimes with a darker ring at apex. 
d. Lateral angles of pronotum armed with a rather stout acute 
spine, the posterior lobe rugulose 15. exsanguis Stal 
dd. Lateral angles of pronotum armed with a short tooth; posterior 
lobe almost smooth 10. laevicollis Champ. 
ddd. Lateral angles of pronotum armed with a short slender spine, 
posterior lobe rugulose. 
e. Legs pale Vl.nugax Stal 
ee. Legs darker and more slender l^.mimus Stal 
