198 CHAKI.es ROBERTSON. 



10. Base of femora reddish, segment 1 of abdomen usually red. .ociileus n. sp. 

 Base of femora black, segment 1 black illiiioeiisis n. sj). 



11. Apex of clypeus truncate or a little rounded aiiomiis Say. 



Apex of clypeus emarginate, with dentiform angles 12. 



12. Ornaments mostly red, segment 1 of abdomen red aiistralis n. sp. 



Ornaments yellow 13. 



13. Both boi'ders of prothorax yellow, segment 2 more globular, its border re- 



flexed fiiiidHtlis Cr. 



Anterior border of prothorax yellow, segment 2 not globular, its border 

 hardly reflexed pedestris Sauss. 



Odyneriis bicoriiiM n. sp. 



9. — Clypeus strongly punctured, apex narrow, with two dentiform angles; 

 head and thorax coarsely punctured ; posterior ocelli with two tubercles between 

 them ; metathorax shining, coai-sely reticulated, its concavity punctured, the bor- 

 ders blunted; first segment coarsely and closely punctured, the second more 

 finely and sparsely punctured ; fluting on first segment distinct, border of second 

 coarsely punctured, somewhat reflexed. Black, with yellow ornaments as fol- 

 lows: spot on base of mandibles, arcuate line on clypeus, scape in front, spot on 

 fi-ont, spot in sinus of the eye, postocular spot, interrupted border of prothorax, 

 tegulse, spot beneath, postscutel, four small spots on metathorax, borders of ab- 

 dominal segments 1, 2 and 4, oblique line on each side of 1, spot ou each side of 

 2, knees, tibiae and tarsi. Length 9 mm. 



% . — Clypeus strongly punctured, strongly bidentate'; tubercles between poste- 

 rior ocelli strongly produced, shining; border of second segment of abdomen 

 strongly canaliculate, strongly reflexed perpendicular to line of profile. Orna- 

 ments about as in the female ; a line in sinus of eye and clypeus entirely yellow, 

 sometimes a spot on mesothorax, the spots on metathorax wanting, oblique line 

 on first segment of abdomen reduced to a spot, border of fifth segment with yel- 

 low Hue; oruaments sometimes more red. Length 9-10 mm. 



Inverness, Florida ; 1 9,5 ^ specimens. The sexes were taken 

 in copnla. 



Otlynei'ii$« bifurciis n. sp. 



9 .— Clost^ly rcisenibles the female of 0. hisfrio, but the clypeus is shorter, more 

 strongly punctured, more bideutate ; metathorax with its concavity less deep, 

 more rounded, its borders.more sharply defined ; first two segments of abdomen 

 more coarsely punctured, the margin of second segment more reflexed. The 

 ornaments about the same; sides of metathorax largely red; first segment of 

 abdomen with the apical margin yellow, the sides of superior portion entirely 

 red, or with two oblique red lines; the legs a little darker at base. Length 9 mm. 



% . — DiflTers from the male of 0. hisfrio in its clypeus being strongly punctured, 

 strongly bidentate. with a deep notch between the teeth ; concavity of metathorax 

 with its borders more sharply defined ; first and second segments of abdomen 

 more strongly punctured, the border of second more strongly reflexed. The 

 ornaments about the same as in 0. hintrio % , but the flagellum is fulvous beneath; 

 metathorax more red on the sides; sides of first segment red on the superior por- 

 tion. Length 9 mm. 



Inverness, Floi-ida ; 2 9,6 $ specimens. 



