1968] 
Coyle — Spider Genus Atypoides 
165 
2. AL spinnerets 1/3 or more as long as PM spinnerets (Fig. 31). 
Abdomen purplish gray or purplish brown. Seminal receptacles 
heavily sclerotized with well developed bowl (Figs. 80-86). 
IVML/IML — 1. 03- 1. 20 river si 
AL spinnerets 1/6 or less (may be extremely reduced and difficult 
to spot) as long as PM spinnerets (Fig. 30). Abdomen pale 
grayish yellow or pale gray. Seminal receptacles less heavily 
sclerotized with bowl weakly developed to absent (Figs. 90^ 
94.) IVML/IML = 1. 34-1. 45 gertschi 
Atypoides riversi O. P.-Cambridge 
Figures 1-3, 10-13, 16, 17, 22-29, 3L 33, 34, 39, 4°, 42, 44, 45, 
47-49, 53-56, 68-70, 80-86. Map 1. 
Atypoides rivers'll O. P.-Cambridge, 1883, Proc. Zool. Soc. Lond., p. 355, 
pi. 36, fig. 2. [Three male and three female syntypes from Berkeley, 
California; collected by J. J. Rivers; in the University Museum, Oxford 
University, England; all examined. (One of these males is here des- 
ignated the lectotype and the other five specimens paralectotypes and are 
so labeled.)] — Roewer, 1942, Katalog der Araneae, 1: 189. 
Atypoides riversi: Simon, 1884, Bull. Soc. Zool. Fr., 9: 316. — Simon, 
1892, Histoire Naturelle des Araignees, 1: 195, fig. 138. — Smith, 1908, 
Ann. Ent. Soc. Amer, 1 (4): 209, 210, 229, pi. 15, figs. 7, 8, 9, pi. 19, 
fig. 2, pi. 20, figs. 3, 4. — Comstock, 1912, The Spider Book, p. 250; op. 
cit., rev. ed., 1940, p. 238. — Gertsch, 1949, American Spiders, p. 131. — ■ 
Bonnet, 1958, Bibliographia Araneorum, 2: 811. 
comments on original description. In his description and 
illustrations of A. riversi , O. P.-Cambridge (1883) failed to in- 
dicate the presence of a conductor on the male palpus. This misled 
subsequent authors (Smith, 1908, and Comstock, 1912, 1940), who 
used the lack of a conductor as a diagnostic character for the genus. 
What may have misled Cambridge is that in the male syntypes the 
embolus has slid distally within the inner conductor sclerite, and 
the inner conductor sclerite has also slid distally and rotated within 
the outer conductor sclerite to extend far beyond it (Figs. 54, 55). A 
few of the A. riversi males which I have collected have similarly 
“flexed” palpi. One should be aware of the possibility of such flexion 
when identifying male antrodiaetids. 
The lectotype and paralectotypes have changed color considerably 
in the 85 years since their description. The greenish hues have dis- 
appeared so that the colors are dull light oranges and orange browns. 
description. See Tables I, II, and III which contain measure- 
ments, meristic characters, and diagnostic ratios for a sample of the 
species and for the lectotype. 
