1895.] The Classification of the Lepidoptera. 257 
EXPLANATION OF PLATE, XVII. 
Fig. 1—Meso- and metanotum of Corydalis cornuta. 
Fig. 2.—Meso- and metanotum of Actias luna, 
Fig. 3.-Meso- and metanotum of Hemaris thysbe. 
Fig. 4—Meso- and metanotum of Micropteryx unimaculella. 
Fig. 5——Meso- and metanotum of Hepialus humuli. 
Fig. 6.—Meso- and metanotum of Hydropsyche phalerata. 
In all the figures : a = scutum of mesonotum ; b = scutellum 
of mesonotum; c = scutum of metanotum ; |d = scutellum of 
metanotum ; p = patagia = paratera of mesonotum. 
Stanford University, California. 
