13. 
W» 
10. 
Gigenee E. Mickel 
Posterior femora largely black; wings subhyaline, not darker at the 
Ey cy, GPa SMP ey fa IME ee ie BO ee ee Crassus 
Longer spur of hind tibiae longer than the basitarsus; apex of femora, 
tibiae and tarsi, yellowish ferttginous 5..:%. ++... «<<. s< columbiae 
Longer spur of hind tibiae about equal in length to the basitarsus; 
legs black, tibiae and tarsi with silvery pile, the tarsi ferruginous 
Apically” klaeet. cesar ne ain crete ele toterereeteocaecne terete o ode aR OTS pepticus 
Males 
. Fore coxae simple; fore femora near the base entire ............. 2 
Fore coxae with an elongate posterior process; fore femora near the 
base Nempareitiates ja. weiss kc os ae cee ale See wale chav al oral rege eee 8 
. Joints 9-11 of antennae visibly broadened on one side, thereby con- 
trasting with the two apical joints; abdomen partly red or entirely 
blacle: he a 74s i. Sea aretote eee wile eae cee ee eee ao fulviventris 
Joints 9-11 of antennae normal, not broadened ....... ich whl bth 3 
. Flagellum with the basal joints not or very slightly rounded out be- 
MCA Us <8 YES, cy Norrell eichucicaresa chair dalvinecoe eater abl acer ete > aaa 4 
Flagellum with the basal joints distinctly rounded out beneath.... 5 
. Apex of femora, tibiae and tarsi, yellow ferruginous; hind tarsi very 
FECHEYMEPIMOSE «5-20 sleled ohuainaye sieiaStnat ol 0 stele Ste. aera tes eee ee Crassus 
Legs, except apex of tarsi, black; hind tarsi rather strongly spinose, 
pepticus 
. Last dorsal abdominal segment not tufted with dark hair ......... 6 
Last dorsal abdominal segment tufted laterally with dark hair .... 7 
. Hind tarsi not at all spinose; lateral teeth of clypeus large and dis- 
HUTNCES Bac s Sieysvat otaices Gate ielale te ee aia a ReorenRee al Heaters eatin ee mandibularis 
Hind tarsi distinctly spinose; longer spur of hind tibiae longer than | 
the? baSwtarsus. s.\onss.c os celeste ecco oheie wide tora reeiccaleetereeeerats calcaratus 
. Emargination of last ventral plate very narrow; first joint of flagellum 
in length about equal to the second; head and thorax with golden 
PUMESCENCES occa ake sid ae citys res the ae Bate e Bia ore ote eee oane harpax 
Emargination of last ventral plate broad and round; first joint of 
flagellum shorter than the second; head and thorax with silvery 
PUDESCENECE . ssiaiais Mc ete as woes Gieree ia eo ele cae eine eee columbiae 
. Pygidium with pile all appressed; usually larger species .......... 9 
Pygidium with pile largely suberect; small black species .......... 10 
. Wings yellow, their apical portion dark, abdomen black, larger species, 
distinctus 
Wings pale yellowish hyaline, not dark apically; abdominal segments 
1 and 2 usually fulvous, rather smaller species ........ rufofasciatus 
Interocular space at vertex much less than the length of antennal 
jointss2-4eninited s.. <14.c. ies ance tic Ristew ns Hoos ee eee II 
