March, I9I2.] GiRAULT : StEPHANODES IN NORTH AMERICA. 41 



glance when members of both are seen mingled together, running over 

 a window pane. Genera also differ in this respect, the manner of walk- 

 ing being characteristic with many of them as is also their general 

 appearance. Nevertheless, although leading to the inference that 

 there is difference, genera separated upon habitus alone, unless very- 

 marked and backed by good structural characteristics, must be more 

 artificial than can be said of the usual genus and, moreover, very 

 closely allied with the group from which they are separated. But for 

 the present it is a good thing to be able to make these separations in 

 order to be able to recognize the species. When these latter become 

 better known and more recognizable, then undoubtedly some of these 

 very closely allied genera must take rank as subgenera, forming divi- 

 sions of the old genus. So at present I do not hesitate to record the 

 following new species as Stcphanodcs psccas. It is a typical Polynema 

 excepting that the first funicle joint of the antenna is elongate, slightly 

 longer than the second (usually distinctly shorter in Polynema, not 

 very much longer than wide ; exceptions are Polynema rednviola 

 Perkins and P. hifasciatipennc (Girault) and the scape, when seen in 

 outline in balsam mounts, is distinctly armed beneath with a line of 

 minute teeth. ^ Also the marginal vein is narrower than usual but its 

 shape varies considerably in Polynemas. The species is a well-marked 

 one colorationally, being intense black with contrasting, intensely 

 chrome-orange legs, abdominal petiole and proximal antennal joints. 

 It differs from the type species, Stcphanodcs clcgans Enock, in its 

 intense orange abdominal petiole, legs and scape, in having the first 

 funicle joint longer than the second and the fourth funicle joint 

 thicker, in h ving the fifth and sixth funicle joints subequal, the fifth 

 slightly longer than the sixth ; and perhaps also in the peculiar 

 sculpture of the scape. The wings are very similar in all details 

 but the posterior wings of clcgans do not appear to bear discal cilia, 

 prominent in this species but not unusual. 

 Stephanodes psecas, new species. 



Female. — Length, 2 nim. 



General color intense black, the abdominal petiole, scape, pedicel, coxae, 

 femora and tibire intense chrome orange, contrasting, the tarsi and first funicle 

 joint paler, yellowish, '' e distal or fourth tarsal joint dusky black; antennae 

 beyond first funicle joint black but the second funicle joint less so, suffused 



' Apparently teeth ; see the descriptive details given later. 



