AMERICAN HYMENOPTERA. 227 



Abdomen rather long, cylindrical in males, broad and carinate in 

 females. 



Le(/s slender; tibite with two short apical spurs. 



Larvae with twenty-two legs. They feed upon the leaves of plants. 

 The habits of a species which feeds upon the rose have been noted by 

 DeGeer, Boucho and Hartig. That of Emph. cinctus is said to pass 

 its pupa state in the stem of the rose, into which the larva burrows. 

 Nothing is known about our own species as yet. 



Table to assist in finding the Species. 

 Section I. — [Emphytus), Hartig. 

 Lanceolate cell with oblique cross line; hinder wing with no middle cell. 



Color black — a white spot on pleura 1, inornatus. 



Color black — middle of abdomen rufous 2, apertus. 



Color black — a white band on tergum; femora yellow- 

 red 3, mellipes. 



Color black — a white band on tergum; femora black. ..4, cinctipes. 

 Section II. — {Harpijyhorus) , Hartig. 

 Lanceolate cell with oblique cross line: hinder wings with one 

 middle cell. 



a. Abdomen long; first tarsal joint as long as all the re- 



mainder. 



Color testaceous, thorax black, scutel pale 5, varianus. 



Color testaceous, thorax black, scutel black 6, versicolor. 



Color testaceous, two black vitt?e on raesothorax 7, testaceus. 



Color testaceous, tijis of antennaj black 8. semicornis. 



Color black, scutel pale 9, tarsatus. 



b. Abdomen short; first tarsal joint not as long as all the 



remainder 



Color black; brownish spots on each segment of ter- 

 gum 10, maculatus. 



Color black, tergum black, tibine and tarsi white 11, recens. 



tibire and tarsi white be- 

 fore 12, articulata. 



Color black, tergum at base white 13, platycerus. 



Section III. — [Aneugmenus), Hartig. 

 Lanceolate cell with no cross line; hinder wings with two 

 middle cells. 



Section I. — {Emphytus) , Hartig. 

 Lanceolate cell with oblique cross line; under wings without middle cell. Bo- 

 dy lengthened. 

 1. E. inornatus. 



Dolerus inornatus, Say, Long's Second Exp. II, 1824, 319, 1. 9 • 

 Emphytus inornatus, Norton, Bost. Proc. viii, 155, 1. J '^ 

 "Body black, polished; feet white; tarsi dusky. Length'^ 9 0.25. Br. wings 

 0.52 inch. 



9. Body slender ; antenna? hardly longer than to base of thorax, 

 third, fourth and fifth joints cylindrical, not very distinctly separated, 



