. Bulletin - New York State Museum. Science. REPORT OF THE STATE ENTOMOLOGIST 1904 463 on the ventral surface of this basal segment. Ordinarily the clas- pette is represented by one or more spined tubercles, but in the extremely generalized Protoculex serratus Theo., this organ is represented by r \\ a conspicuous basal spined lobe and a longer, acute one near the apex of the basal segment. This suggests that a still more generalized form may possess clasps and their ventral counter- part, the claspette, more largely developed, and it is possible^ that in some forms they are approximately equa
. Bulletin - New York State Museum. Science. REPORT OF THE STATE ENTOMOLOGIST 1904 463 on the ventral surface of this basal segment. Ordinarily the clas- pette is represented by one or more spined tubercles, but in the extremely generalized Protoculex serratus Theo., this organ is represented by r \\ a conspicuous basal spined lobe and a longer, acute one near the apex of the basal segment. This suggests that a still more generalized form may possess clasps and their ventral counter- part, the claspette, more largely developed, and it is possible^ that in some forms they are approximately equal. There is an approach to this in Wyeomyia smithii Coq. The basal clasp s eg m e n t consists of two nearly Fig. 4 equal chitinous pro- cesses connected only by a thin membrane apically and by no means firmly joined basally. The peculiar divided terminal segment is plainly com- poimd and may have been produced by the fusion of two comparatively simple processes. This conception affords a ready explanation for the persistance throughout the group of more or less prominent tubercular elevations on the ventral surface of the clasp segment, and if our interpretation be correct, the degree of develop- ment along certain lines at least, will be accurately indicated by this organ. The terminal clasp segment is much more slender than the basal one and in some species is very elongate and arcuate. This is particularly true in the Anophelinae. The large majority of forms have at or near the apex of the terminal clasp segment, a more or less developed spine, apparently the rudiment of a ventral second segment and analogous to the claspette of the basal segment. This spine is absent in some forms and double in others. This terminal segment presents considerable morphologic differences and in some forms bears striking appendages, notably in the case. Protoculex serratus, ventral aspect of male genitalia: ^^J=terminal clasp segment; bes=hasal .clasp segment; /i=harpes; hp= go; c=cl
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