14 
20. 
21. 
22. 
23. 
24. 
25. 
26. 
27. 
28. 
29. 
30. 
31. 
32. 
33. 
34, 
(19) 
(20) 
(21) 
(22) 
(19) 
(24) 
(25) 
(24) 
(27) 
(28) 
(28) 
(30) 
(31) 
(27) 
(33) 
PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
Basal arm of the tenth sternite long and curved. ....... .21 
Basal arm or the tenth sternite short and straight. . . . . . pipiens 
Apical lobe of the basistyle with three rods, a sin a hooked seta, and a 
straight seta . . RS ee 
Apical lobe of the Dacicigle ah Aone deales a eae antl a straight 
Setaenrs soars Leo spe  Drethest 
Apical third of ihe Aistatyle wachoue nee Sa den yh ER eee 
Apical third of the dististyle with minute annulations (this character 
is best seen under oil immersion or phase contrast) . . . acharistus 
Hooked accessory seta on apical lobe of the basistyle unusually strong 
and curved; median process of the mesosome with about two small, 
lightly sclerotized denticles . .. . ... . . .laticlasper 
Hooked accessory seta on apical lobe of {he basistyle not unusually 
strong, gently curved; median process of the mesOsome completely 
without teeth ... . . . .restuans 
Apical lobe of the soa <a sae ents aeennt (brondly modified 
setae are not here considered as leaves) . . . A eee eg 242) 
Apical lobe of the basistyle with only one leaf prenenea = ce Mee, oR ETT 
Dististyle not annulate terminally. ... . Bh nen PAG) 
Dististyle minutely annulate at the formal eae : Vetere: 
Dististyle with a distinct enlargement at the apex; apical lobe of the 
basistyle bearing three rods in addition to the two leaves . . foliaceus 
Dististyle without a distinct enlargement at the apex; apical lobe of the 
basistyle bearing three rods and a hooked seta in addition to the two 
leaves .. . » lan tothe s teahales 
Tenth sternite ned ai aes aes 5 spines at the apex and 
short, spatulate spines on the outer lateral margins. . . .. . .28 
Tenth sternite crowned with short, pointed spines; spines on the outer 
lateral margins) not spatulate. = = 3 4 secede ince eos 
Ventral cornu pointed.and.dentiform: s+... 4" 44.4248 aoe eee 
Ventral cornu rounded and rugulose. . . ¢ oO 
Apical lobe of the basistyle with three plane roden a ieee pom 
seta, a straight seta, and a narrow leaf. . ...... . . tarsalis 
Apical lobe of the basistyle with a blunt rod, two hooked rods, a normal 
oblongo-ovatum leaf, two or three slender hooked setae, and one 
slender seta... . . . . . . abnormalis 
Dististyle not minutely pamieie a cue ecrraanell end) sonia ieeol 
Dististyle minutely annulate at the terminal end; central portion of the 
dististyle scimitar-like in shape. . . . . . . . Scimitar 
External process evenly tapered; not rounded Steals aony R) Se proe, 
External process gradually curved apically so that the point is directed 
laterally... . . . . . Chidesteri 
Apical lobe of the baceteds ae a Soran oa cme hooked rods, an 
accessory seta, and a normal leaf... . . . .nhigripalpus 
Apical lobe of the basistyle with a anon rod, ae Heoked rods, three 
setae, andanarrowleaf..... ‘ i gos eee Ssphinx 
Ventral cornu rounded, rugulose on outers HeOCHHADNS) Wee G66) ovo 6 wes 
Ventral cornu pointed and not rugulose .. . go NE enon 
Apical lobe of the basistyle with five papeaunlese Ghiecs rods, an ac- 
cessory seta, and a leaf... . ST S5 
Apical lobe of the basistyle with six appendices: “Thre ee sods a hooked 
seta;-a-straight seta; andialeafi sa 2) alc 2h Seek See 
