. Bulletin - United States National Museum. Science. INTRODUCTION ROBBER FLIES OF THE WORLD 13 Explanation, Text-Figures 4 and 5 1, Eighth tergite. 2, Eighth sternite. 3, Epandrium. 4, Hypandrium. 5, Gonopod. 6, Superior forceps. 7, Aedeagus. 8, Penis guides (or sheath). 9, Proctiger. 10, Clasper. 11, Pseudoclasper. 12, Paralobus. 13, Hamate process. 14, Cavity of superior forceps. 15, Cut edge of superior forceps. 16, Cut edge of gonopod. 17, Aedeagus sheath. 18, Cavity of gonopod. 19, Penis II 10 5 4 Text-Figure 5.—a-c, e, Diogmites platypterus Loew: a, exterior view of gonopod with
. Bulletin - United States National Museum. Science. INTRODUCTION ROBBER FLIES OF THE WORLD 13 Explanation, Text-Figures 4 and 5 1, Eighth tergite. 2, Eighth sternite. 3, Epandrium. 4, Hypandrium. 5, Gonopod. 6, Superior forceps. 7, Aedeagus. 8, Penis guides (or sheath). 9, Proctiger. 10, Clasper. 11, Pseudoclasper. 12, Paralobus. 13, Hamate process. 14, Cavity of superior forceps. 15, Cut edge of superior forceps. 16, Cut edge of gonopod. 17, Aedeagus sheath. 18, Cavity of gonopod. 19, Penis II 10 5 4 Text-Figure 5.—a-c, e, Diogmites platypterus Loew: a, exterior view of gonopod with processes; B, medial view of gonopod with processes; c, aedeagus and sheath from ventral aspect; e, lateral aspect with true right gonopod and whole proctiger removed. D, Astochia sp., the superior forceps removed. rior forceps do not begin until some distance from the base of the segment. Between the superior forceps (epandrium) and the ninth sternite, there is usually a well developed, paired, lateral organ somewhat shorter than the epandrium and attached to or borne by the ninth sternite. This is the inferior forceps of Oldroyd (1938), and to avoid the additional use of the word forceps, I have uni- formly called this structure the gonopod, since it is borne dorsally from the hypandrium. This lateral structure appears to be equivalent to the gonopods of authors. Beyond this point the confusion with regard to the characteristic, distal processes so often seen in the Asilidae grows greater, and since clear evidence of segmental character is wanting, I have rejected the use of the terms styli or surstyli for these processes. It will be noted that the lateral gonopod often bears a medial, more or less upright, arched and sublamellate process tending to enclose the aedeagus (distiphallus): I have followed Oldroyd (1938) and others in calling this lateral and medial appendage the clasper, when it is clearly borne by the gonopod. This structure, the gonopod, when present tends t
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
