Preliminary Key to California Late Instar Soliperla Larvae

1 Abdominal terga 4-6 typically with elongate, pale median spot (Fig. 15); known from Plumas and Sierra counties ……………………… S. sierra

1’ Abdominal terga 5-6 typically with variably shaped, pale median spot (Fig. 16); widely distributed in Coast Range and at scattered sites in the Sierra Nevada; uncommon in Plumas and Sierra counties ...………………..……………….. 2

2 Median pale spot on abdominal tergum 6 almost as large as median pale spot on abdominal tergum 5 (Fig. 16); median spots on terga 5-6 usually elongate ……………… S. thyra

2’ Median pale spot on abdominal tergum 6 less than half as large as median spot on abdominal tergum 5 (Fig. 14); median spots on terga 5-6 often bell or triangular in shape ….………………………………… S. quadrispinula