HEMEROBIIDAE OF WESTERN NORTH AMERICA — NAKAHARA 207 



Sympherobius angustus (Banks) 



Hemerohius angustus Banks, Trans. Anier. Ent. Soc, vol. 30, p. 102, 1904. 



♦Nevada: Mt. Charleston near Las Vegas [A]. *California: 

 Yosemite Park [A]. Washington: Mt. Rainier [A]. Utah: Logan 

 [USNM]. Colorado: Cheyenne Canyon [USNM]; Bierstadt Lake in 

 Rocky Mountain National Park [A]. New Mexico: Las Vegas [USNM]. 



The head of this species was described by Carpenter as "dark 

 brown, almost black." In many specimens, especially of small size, 

 it is much lighter, often yellowish, with a large dark patch on frons 

 below the antennae. I have dissected the male genitalia of a few 

 specimens with the yellowish head and satisfied myself that they are 

 not separable from S. angustus. 



Sympherobius stangei Nakahara 



Sympherobius stangei Nakahara, Mushi, vol. 34, p. 16, 1960. 



♦Colorado: Nymph Lake, Rocky Mountain National Park, 1 

 female [A]. 



The specimen completely agrees with the unique type of S. stangei, 

 except that it is slightly smaller (length of forewing 6 mm. against 

 7 mm, in the latter). The original description is quoted here for the 

 benefit of those to whom it may not be easily accessible: 



Head yellowish bro-mi, clypeus darker, palpi fuscous black, antennae fuscous 

 black with paler basal joint. Forewing rather narrow, but much less so than 

 in angustus, and fully rounded apically. Membrane colorless, broadly fuscous 

 black along apical to outer margin; all veins behind Ri, except basal part of Cu2, 

 distal part of first anal and basal half of second anal, broadly marked with fuscous 

 black; cells thus strongly marked out are clear-colorless, not containing any spot. 

 Hindwing less strongly margined with fuscous, veins dark but unmarked. 



Two branches to Rs in forewing, with radial crossvein between R4+5 and Ri be- 

 fore the origin of R2+3; first fork of Cui distal to crossvein m-cu. 



Length of forewing, 7 mm; width 2.5 mm. 



Holotype: specimen lacking abdomen. Barton Flats, San Bernardino Co., 

 California, July 22, 1953 (Lionel A. Stange). 



This is a large and beautifully marked species, perhaps related to occidenialis 

 (Fitch). The striking markings and venational characters of forewing alone 

 may be sufficient for the recognition of this new species. 



Sympherobius brunneus, new species 



Figure 1; Plate 1 (Figure 1) 



Holotype cf , Miami Ranger Station (elevation 5000 ft.), Mariposa 

 Co., Cahf., July 5, 1945. Paratopotype cf, July 1, 1954. Both 

 collected by H. P. Chandler. Right forewing (dry) and dissected 

 parts of genitalia (in balsam) of holotype mounted on two slides. 

 Paratopotype is without left forewing; terminal abdominal segments 

 in glycerol in small vial on the same pin. USNM type 66174. 



