Memoirs of the National Academy of Sciences . ]\Iicr6pteryx. The shape of the scutellum is that of a lowflattened triangle. As regards the abdomen, attention should be called to the dispavity in size and shape betweenthe sexes; also to the male genital armature, which is very large and completely exserted,and reminds us of that of Corydalus, in which, however, the lateral claspers are much reduced;and also of that of certain Trichoptera (Sericostonia, Tinodes, Stenophylax, Hydropsyche, etc.).The venation of both pairs of wings is much as in jMicropterys. The larval characters of this suborder
Memoirs of the National Academy of Sciences . ]\Iicr6pteryx. The shape of the scutellum is that of a lowflattened triangle. As regards the abdomen, attention should be called to the dispavity in size and shape betweenthe sexes; also to the male genital armature, which is very large and completely exserted,and reminds us of that of Corydalus, in which, however, the lateral claspers are much reduced;and also of that of certain Trichoptera (Sericostonia, Tinodes, Stenophylax, Hydropsyche, etc.).The venation of both pairs of wings is much as in jMicropterys. The larval characters of this suborder it would be difiQcult to give, for in the remarkable larvaof Eriocephala calfhelhi, as described and figured in Dr. Chapmans elaborate account, we appear tohave a highly modified form, entirely unlike the simple apodous larva of Micfopteryx and perhapsquite unlike the primitive stem-forms of lepidopterous larvre. Chapman well represents its form, as?we can testify from mounted specimens in a slide kindly given us by him. The body is broad. Fig. 3.—Mandible of Erioce-phala calthdUi; a. a, inner .indouter articulation; s. cavity ofthe joint (acetabulum); A, endseen from .side of tbe exultingedj^e.—After Walter. 60 iMEMOirtS OF THE NATIONAL ACADEMY OF SCIENCES. and flattened, the segments very short in proportion to their \yi(It]i, the prothoracic segment,,however, very long in proportion to the others, but tlie surface rough and corrugated, not with ahard smooth dorsal phite, as in many Tineida-, Tortricida^, Cossidie, etc., since it is not a boringinsect. The eight pairs of abdominal prop-like tubercles, which we should hardly regard ashomologues of the abdominal legs, are, like those of the Panorpida, simple tubercles armedwith a spine. The tenth or last abdominal segment is armed with a pair of dorsal spines, eacharising from a tubercle. The singular flattened and fluted seta^ represented by Chapman areunique in lepidopterous He also describes a trefoil shaped suck
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