. Memoirs of the American Entomological Society . ). Female. — Unknown. Nymph. — Unknown. Ova. — Unknown. Material examined. — Paraiypes, CALIFORNIA: Fresno Co., 7 mi. ofAcademy, elevation 800 feet, 19/V/1955, D. L. Abell, 2 $ (Si). Distribution. — USA — CALIFORNIA (Fig. 152). Diagnosis and Discussion. — /. acula is a very rare species, knownonly from 4 male specimens. Placement in this species group is question-able, and is based entirely on adult pigment patterns of the head andpronotum, and Jewetts (1962) description of the aedeagal sclerotizedstructure. The terminal portion of the abd
. Memoirs of the American Entomological Society . ). Female. — Unknown. Nymph. — Unknown. Ova. — Unknown. Material examined. — Paraiypes, CALIFORNIA: Fresno Co., 7 mi. ofAcademy, elevation 800 feet, 19/V/1955, D. L. Abell, 2 $ (Si). Distribution. — USA — CALIFORNIA (Fig. 152). Diagnosis and Discussion. — /. acula is a very rare species, knownonly from 4 male specimens. Placement in this species group is question-able, and is based entirely on adult pigment patterns of the head andpronotum, and Jewetts (1962) description of the aedeagal sclerotizedstructure. The terminal portion of the abdomen had been cleared, and MEM. AMER. ENT. SOC, 32 78 WESTERN ISOPERLA the aedeagus partially everted, in the 2 paratype specimens studied, al-though the aedeagal sac in both had apparently ruptured and the apicalportion was missing, along with the sclerotized process. Discussion ofrelationships with other species must await association and description ofnymphs, females, and ova. Nothing is known of the biology of this I. aculaQ I. aduncaQ I. bifurcataq I. denninqi A I. fusca U I. petersoni# I. rainieraA I. sordida B Figure 152. — Distribution of the /. sordida complex. S. W. SZCZYTKO & K. W. STEWART 79
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