62 
Clarence E. Mickel 
lines forming it not foveolate; pronotum with a small, blunt promi- 
nence laterally: allthe tags brownish .2n.4ee aoee oe eee nigricornis 
Males 
. Abdomen always spotted or marked with yellowish ............... z 
Abdomen not spotted, entirely black; ocelli forming an equilateral 
PTIATIOVSS 50 Lips dew Maa koeee COR Oe ee te eine cate ee Ee II 
. Fore tibiae bearing a large vari-shaped shield ..........,.....2020- 3 
Fore tibiae without a shield, simple; pronotum strongly dentate lat- 
Stall. <: ble casclsw 4k sisale wa RS oss OES Rene ae ae 
. Antennae more or less dilated, the joints more or less prolonged be- 
neath; fifth joint of fore tarsi with a peculiar appendage ....... 4 
Antennae simple, fifth joint of fore tarsi without an appendage ... 7 
. First joint of flagellum not broadened to meet the second, not longer, 
though broader, than the pedicel, the four terminal joints together 
about as long as the three preceding ones united, joints 2-6 with a 
large appendix on outer margin, that on joint 2 narrowest and most 
curved, that on joint 6 broadest and not curved (tibial shield brown- 
ish, yellow basally, covered with pale dots, which are at extreme 
base and apex, linear; scutellum and metanotum black; first ab- 
dominal tergite banded; intermediate legs, coxae excepted, entirely 
yellow, the first joint of their tarsi about twice as long as the re- 
meaning tarsal jaimts.anited > jc 3342 snus ews pee ee argus 
First joint of flagellum broadened to meet the second, longer than the 
pedicel, the four terminal joints as long as or longer than the four 
preceding joints united, none of the joints with a long, acute appen- 
diss (60 -Gtiter (mmarmin’s..33.ce ee ee beet rae ra Ee ee 5 
. First joint of flagellum not hirsute beneath; tibial shield very large, 
fully. two thitds as. loneas the thorax -ecs cc tse ee eee latipes 
First joint of flagellum with a bunch of pale, curled hair beneath.. 6 
. Anterior femora at the base of outer margin with a strong production, 
which is somewhat bifurcate at apex; space between hind ocelli 
much less than that between them and the nearest eye-margin; 
tibial shield basally yellow, posteriorly greenish, and streaked and 
dotteds: wath yellow: ee so scoala oe ee ee pleuralis 
Anterior femora at base of outer margin with a sharp tooth; space 
between hind ocelli but little less than that between them and the 
nearest eye-margin; tibial shield in greater part deep black, basally 
greenish and with broken streaks of yellow ................ largior 
. Flagellum short, stout, not much more than twice the length of the 
scape; mesosternum naked; mesepisterna sparsely and rather sub- 
tilely punctured; fore femora beneath yellow and greater part of 
tibiae ot, that’ colors imetanotanmplackiwieteme ee eee eee tumidus 
Flagellum long, slender, at least three times as long as the scape.. 8 
380 
