. Annals of the Entomological Society of America. Entomology. '.llDl The Palpi of Male Spiders 183 A lamelliform embolus.—In this type the embolus is flattened, and may bear a greater or less number of apophyses; an example of this type is found in Lepthyphantes miniita (Fig. 25, 2.) A spiral embolus.—In the spiral type, as seen in Agelena, for example, the embolus is long, slender and coiled; and, in a well- expanded specimen, it is seen to be composed of three distinct parts: first, the wall of the convex side is densely chitinized, forming a gutterlike sclerite, which may be termed the trun
. Annals of the Entomological Society of America. Entomology. '.llDl The Palpi of Male Spiders 183 A lamelliform embolus.—In this type the embolus is flattened, and may bear a greater or less number of apophyses; an example of this type is found in Lepthyphantes miniita (Fig. 25, 2.) A spiral embolus.—In the spiral type, as seen in Agelena, for example, the embolus is long, slender and coiled; and, in a well- expanded specimen, it is seen to be composed of three distinct parts: first, the wall of the convex side is densely chitinized, forming a gutterlike sclerite, which may be termed the trunk of the embolus (truncus) (Fig. 25, S, t. e.); second, the greater ]jart of the wall of the embolus is membranous, and forms a loose flap along the concave side of the organ, which contains the ejaculatory duct; this flap (Fig. 25, .?, p. p.) may be desig- nated the pars pendula of the embolus; third, at the distal end of the pars pendula, there is a triangular, chitinized area, through which the ejaculatory duct opens (Figs. 25, 3, a. s.), thi^ may he termed the apical sclerite of the embolus. The pars pendula and the apical sclerite may be completely withdrawn into the trunk of the embolus, so that only the latter is visible; the embolus then appears to be merely a strongly chitinized style; it is in this condition that it is usually seen and described. CONCLUSION. In the preparation of this paper many palpi other than those figured here have been studied; and it is believed that the series examined has been sufficiently large to warrant the con- clusions given regarding the fundamental parts of the genital bulb. There remains to be determined the manner in which the different types of palpi have been specialized in other families of the order, and the details of the modifications characteristic of genera. This, however, is too great an undertaking to be at- tempted at this time, and must be left for those who monograph the different Fig. Three types of e
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