. Annals of the Entomological Society of America. Entomology. 1 s2 [midls lintowoloii^idil Socu'ty of Anicricd \\\)\. Ill Tiiii Anklli (>i- nil-: SL'HTKi;rLrM. In Anuica, the cliiii- nized part of the wall of the basal division of the bulb, the sub- tej^nilum. is reduced to a ringlike sclerite (Fig. 24, i.); Init in certain other genera, the subtegulum is cup-shaped or basket- like, in Aiiclcfiii uccvia (Fig. 24, 2), one side of the subtegulum is greatly thickened; at the i)roxiinal end of this thickening, which corresponds to the lunate ])late, there is a condyle, which articulates with th
. Annals of the Entomological Society of America. Entomology. 1 s2 [midls lintowoloii^idil Socu'ty of Anicricd \\\)\. Ill Tiiii Anklli (>i- nil-: SL'HTKi;rLrM. In Anuica, the cliiii- nized part of the wall of the basal division of the bulb, the sub- tej^nilum. is reduced to a ringlike sclerite (Fig. 24, i.); Init in certain other genera, the subtegulum is cup-shaped or basket- like, in Aiiclcfiii uccvia (Fig. 24, 2), one side of the subtegulum is greatly thickened; at the i)roxiinal end of this thickening, which corresponds to the lunate ])late, there is a condyle, which articulates with the i)etiole; and at the distal end, there is a condyle, which articulates with the tegulum. The other side of the cuplike subtegulum contains in its wall several parallel, incompletely ringlike sclerites; these may be termed the anclli of the subtegulum. In Dolomcdcs fontauus (Fig. 24, 3), the anelli of the subtegulum are greatly thickened and form prom- inent projecting ridges. It is probai)le that the presence of the anelli of the sul)te- gulum. and their nature when present will afford characters of use for taxonomic ]niri) 21. rii; kinds suhtcsjiilum. TiiK DiFFKRENT TvPEs OF Emholus.—The form of the embolus varies greatly in difTercnt species of spiders. Two prin- cipal ty])es can be recognized, the connate and the free; and the free type includes three subtypes. The connate type of embolus.—In the connate type, the embolus is not separate from the middle division of the bulb but is merely a more slender continuation of it. as in the taran- tulas, Loxosceles (Fig. 4). and Aricuhia. The free type of embolus.—In the free type of embolus, there are one or more movable articulations between the embolus ami the middle division of the bulb. In the free type, the embolus varies greatly in form; but the ditYerent forms can be grouped under three heads: coniform, lamelliform. and spiral. .4 coniform embolus.—In this type, there may be a broadly expanded base;
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectentomology, bookyear1
