32 
PAN-PACIFIC ENTOMOLOGIST 
slightly ventrad; large, wide mesobasal lobe and sinuous dorsal margin of 
clasper; mesal lobe of sternum 6 absent. 
Male .—Length 4.5 mm. General color ochraceous. Spurs long, slender. 
Antennal scape short, robust, subequal to next 3 segments. Cerci ovate, 
dorsad of lateral apodeme. Sterna 3, 4, 5 with mesh-like reticulation; ster¬ 
num 6 mesal lobe absent. Genitalia, Fig. 5. Sternum 9 practically same width 
throughout, lateral margin produced to obtuse angle. Tergum 10, lateral 
aspect (Fig. 5), narrowed distally, from dorsal aspect, apex minutely bilo- 
bate. Clasper gradually expanded dorsad from base, dorsal margin with 
antero-dorsal and postero-dorsal lobes, setation light; from ventral aspect 
(Fig. 5A), clasper curved mesad, apex acuminate and acute; from this view 
the postero-dorsal lobe is discernible. Phallus projected caudad slightly 
beyond tergum 10, curved gradually ventrad to subacute apex. 
Holotype. —Male, California: San Bernardino County, Sheep Creek Can¬ 
yon, 5 May 1950, A. L. Melander. Saul Frommer, Entomology Department, 
University of California, Riverside (pers. comm.) states; “Sheep Creek 
Road joins Hwy. 138 south of Phelan, Sheep Creek is west of the road.” 
Type to be deposited Entomology Department, University of California, 
Riverside. 
Helicopsyche mexicana Banks 
This species is widely distributed from Frijole, Texas (Ross, 1944) to 
southern Utah and California into Mexico. New records are: Washington 
County, Utah, Leeds Canyon, July 1964, W. J. Hanson (Utah State Uni¬ 
versity); Los Angeles County, California, Graveyard Canyon, 9 May 1970, 
J. A. Honey (Los Angeles County Museum of Natural History). 
Male .—Sterna 3, 4 with mesh-like reticulation; sternum 6 mesal lobe lu- 
teous, short (Fig. 6) usually about half the length of the sternite. The contour 
of the clasper, especially the dorsal margin, is quite variable. 
Female .—Sternum 4, 5 with mesh-like reticulation. Caudal margins sterna 
6, 7 with dense blackish setae. From ventral aspect, the darkly pigmented 
margin of the bursa copulatrix are discernible in cleared specimens, (Fig. 
6A). This species is widely distributed in Arizona and is the dominant hel- 
icopsychid in that state. 
Literature Cited 
Flint, O. S. 1974. The Trichoptera of Surinam. Studies on the fauna of Suriname and other 
Guyanas. XIV: 1-151. 
Ross, H. H. 1974. The Caddisflies of Illinois. Ill. Nat. Hist. Surv. Bull. 23: 1-326. 
Ross, H. H. 1956. New species of Helicopsyche from the Western Hemisphere (Trichop¬ 
tera, Helicopsychidae). J. Wash. Acad. Sci. 46(12): 397-401. 
