82 CHARLES ROBERTSON. 



7. Oxyheliis la'liiK Say. 



0. Ixtiis Say, Bost. Journ. Nat. Hist. i. 375. 

 % .—Head and thorax coarsely and closely punctured. Clypeal process promi- 

 nent; prothorax carinate; scutellum with a median longitudinal carina; post- 

 scutellum with a i)rominent carina, resembling a short spine from the side; 

 squama long and narrow. Spine long and narrow, deeply channeled above, 

 rounded at tip ; base of metathorax with coarse reticulations. Abdomen 

 slightly impressed at base, rather coarsely and not very closely punctured, apical 

 margins of segments depressed, lateral spines minute. Black, smooth and shin- 

 ing; pubescence on face silvery, on vertex and mesothorax brownish. Mandi- 

 bles, except tips, interrupted line on prothorax involving tubercles, two large 

 spots on scutellum and inner border of squama, lemon-yellow; flagellum fulvous, 

 darker at base, tip of scape yellow. Wing scales testaceous. Spot on each side 

 of segments 1-5, and sometimes apical margin of 6th segment of abdomen, yel- 

 low. Legs black, femora at tips, more broadly on anterior, tibipe exteriorly and 

 tarsi, yellow. Wings hyaline, nervures dull ferruginous. Length 4-5.5 mm. 



Virginia, Illinois. Two male specimens (coll. Am. Ent. Soc. and 

 C. R.). 



I took one of these on flowers of Cicuta maculata, July 12, 1887. 



Resembles 0. Packardii % , but is much smaller, the legs more 

 yellow, the scutellum spotted. 



8. Oxybeliis riilvipes n. sp. 



% . — Head and thorax closely and coarsely punctured. Clypeal process promi- 

 nent; prothorax carinate; scutellum and postscutellum with a strong longitu- 

 dinal carina; squama ovate, long pointed. S])ine deeply channeled, narrowing 

 above to truncate tip : base of metathorax with coarse reticulations. Median 

 space below spine reticulated and shining. Abdomen triangular, smooth and 

 shining, with a broad shallow depression at base ; segments with apical margins 

 depressed, more sparcely punctured in middle, with short lateral spines. BlHck. 

 pubescence on vertex and mesothorax yellowish, elsewhere whitish, dense and 

 silvery on face. Antennae, interrupted line on prothorax involving tubercles, 

 tegulse, extreme base of wing, bilobed transverse line on scutellum, inner border 

 of squama, spine, legs entirely, spots on each side of first and second segments of 

 abdomen, larger on first, reddish orange. The mandibles, except tips, tips of ante- 

 rior femora, anterior and middle tibije exteriorly and tarsi, lighter yellow. Coxse 

 mostly blackish, apical segment of abdomen red. Wings a little dusky, nervures 

 dull testaceous. Length 7 mm. 



One male s|)ecimen, taken at Orlando, Florida, March J. '5, 1887, 

 on flowers of Hydrocotyle umbellata. 



9. O.xybeliis iiiger n. sp. 



% .—Smooth and shining, not very closely or coaj-sely punctured. Clypeal 

 process feeble; prothorax carinate; scutellum feebly, postscutellum strongly 

 longitudinally carinate; postscutellum strongly produced behind over base of 

 spine; squama ovate, rather short pointed. Spine rather short, parallel, nar- 

 rowed near apex to the truncate tip; base of metathorax with few radiating 

 rug8e on the sides. Median space below spine broad arrow shaped, smooth and 



