NORTH AIMKRICAN HYMKXOPTEKA. 81 



dominal segments 1-4 with vvliitish spots on each side, widely separated on first 

 and second, narrower and closer on third and fourth; fifth segment black, or 

 with two small spots on middle; apical segment rufous, sometimes nearly black. 

 Legs black, anterior tibije and tarsi yellowish or ferruginous, and apical joints of 

 other tarsi ferruginous, middle and hind tibife sometimes whitish at base exte- 

 riorly. Wings hyaline, nervures dull ferruginous. 



% . — More closely and coarsely punctured, abdomen with rather long lateral 

 spines, the ornaments more yellow. Prothorax usually, scutellum and postscu- 

 tellura black. Abdomen 8-spotted, the spots diminishing towards apex. Anterior 

 femora at tips sometimes, all tibiis at base extending more or less towards tips, 

 yellow, tarsi pale or brownish. 



Var. texanus ^ . — Prothorax and tubercles sometimes black ; scutellum black. 

 Antennaj darker above; wing scales and extreme base of wing generally honey- 

 yellow. Abdomen 4-8 spotted, r)r nearly black, the ornaments sometimes re- 

 duced to two small faint spots on first segment. Legs inclining to ferruginous; 

 tibiffi at base exteriorly, sometimes to the tips of posterior pair yellowish. Wings 

 hyaline, nervures yellow. 



% . — The tubercles, anterior femora at tips beneath, all tibite exteriorly, tarsi, 

 4-6 spots on abdomen, yellow. Length f, 6.5-8 mm. ; % , 5.5-7 mm. 



Illinois, Texas. Eleven males, twenty females (coll. Am. Ent. 

 Hoc. and C. R.). 



I have taken it from June 8th, to August 9th on flowers of Eulo- 

 phus, Cicuta and Slum. 



Dedicated to Dr. A. S. Packard, Jr., who first described it. 



6. Oxybeliis sericeus n. sp. 



9. — Head and thorax finely and closely punctured. Clypeal process low: 

 prothorax carinate ; scutellum with an obscure longitudinal carina; postscutel- 

 lum carinate. Squama ovate, rather siiort pointed ; spine long and narrow 

 tapering to a truncate tip; base of metathorax reticulated; median space below 

 spine narrowing to a point near insertion of abdomen: lateral faces finely 

 roughened. Abdomen very finely and rather sparsely punctured, smooth and 

 shining, longitudinally impressed at base, apical margins of segments hardly 

 depressed. Black, thickly clothed with long white pubescence, which is dense 

 and silvery on face and on apical margins of abdominal segments. Two spots on 

 prothorax, tubercles, spot on tegulse, two remote s])ots on scutellum and spots on 

 squamse, yellowish. Mandibles, except tips, honey-yellow ; fiagellum dull honey- 

 yellow, black at base; tegulse testaceous; spine whitish on apical half. Ab- 

 dominal segments 1-4 with an elongated yellowish spot on each side, the spots 

 somewhat emarginate in front : a])ical border of fifth and all of sixth segment 

 pale rufous. Legs black, middle femora at tips beneath, tibife exteriorly and 

 and anterior tarsi yellowish, the other tarsi ferruginous at tips. Wings hyaline, 

 nervures testaceous. Length 7 mm. 



Illinois. One female specimen (coll. Am. Ent. Soc. ). 

 Resembles 0. Packardii, but is smaller, moi-e finely punctured antl 

 with a different livery. 



TRAN.S. AM. ENT. soc. XVI. (11) MARCH, 1889. 



