46 Bulletin of Laboratories of Denison University [ voi. xi. 
3. Stigma honey-color, or at least not dark brown, . 4 
Stigma dark brown or black, . . . .6 
4. Teguloe dark piceous, larger species, ... 5 
Tegulae dark testaceous, smaller species, nam. long. 
(Mesilla Valley.) .... amicus^ Ckll, 
5. Wings tinged yellowish, nervures honey-color. (Ruidoso 
Creek, Bernalillo, Paraje.), . . coriaceus^ Smith. 
Wings clear, nervures fuscous, hair-bands of abdomen 
white. (Mesilla Valley.) . . bardus, Cresson. 
6. Tegulse testaceous]; metathoracic enclosure truncate be- 
hind, with a sharp rim. (Mesilla Valley, Watrous.) 
. . . . sisymbrii^ Ckll. 
Teguloe black ; metathoracic ^enclosure semilunar. (Me- « 
silla Valley.) .... angustior, Ckll. 
7. Abdomen black, the segments not margined with; testa- 
ceous; first segment impunctate; lateral white hair- 
patches present ; stigma piceous. (Mesilla Valley, Ros- 
well, Santa Fe.) . . . pectoraloides^ Ckll. 
Abdomen rather brownish, the hind^ margins of the seg- 
ments more or less testaceous, ’first' segment punctured, 
stigma honey color, .... 8 
8. Flagellum more or less testaceous beneath, tarsi rufous, 
first segment of abdomen transverselyjstriate. (Mesilla 
Valley, Santa F6.) . . . subobscurus, Ckll. 
Flagellum wholly dark, tarsi dark, first segment of abdo- 
men not transversely striate, amicus, Ckll, (when worn.) 
9. Mesothorax blue-black, scutellum and postcutellum dark 
greenish. (Santa Fe.) . . . tripartitus, Ckll. 
Mesothorax bronze-green or olive-green. (Mesilla Valley.) 
meliloti, Ckll. 
10. Very small ; teguloe punctured. (Mesilla.) pseudotegularis, CkW. 
Tegulce not punctured, . . . . Ii 
11. Cheeks with a conspicuous tubercle beneath. Length 
about 6 mm., head and thorax dark bluish-green vary- 
ing to olive green ; abdomen very dark brown, with a 
distinct green lustre ; hind margins of abdominal seg- 
ments more or less testaceous; legs piceous; pubescence 
scanty, dirty white ; abdomen pruinose-pubesent. 
Wings hyaline, stigma and nervures honey-color; tegul^e 
dark brown. Head very large, facial quadrangle about 
square ; apical portion of clypeus purplish-back ; front 
and sides of the face with small close punctures; meso- 
thorax and scutellum with distinct but very sparse 
punctures ; base of metathorax shining, obscurely 
roughened, with very faint longitudinal wrinkles towards 
the sides. Abdomen shining, hardly punctured. Al- 
lied to H. connexus and H, cephalotes, (Las Cruces, 
