1974] 
Coyle — Genus A liatypus 
441 
Palpus. The conductor of the Aliatypus palpus (Fig. 97) consists 
of an inner conductor sclerite (ICS) and an outer conductor sclerite 
(OCS) which lies outside and partly cradles the ICS and the em- 
bolus. The ICS base is forked, with the more well developed of the 
two branches being called the proximal branch. 
Female genitalia. In Aliatypus the bursa copulatrix , which opens 
just anterior and ventral to the uterus opening in the epigastric fur- 
row, is bilobed and weakly sclerotized. The four seminal receptacles 
(Fig. 163) are functionally paired so that the two on the right side 
open close to one another into the right lobe of the bursa copulatrix 
and the other two open together into the left lobe. Each seminal 
receptacle is weakly sclerotized and consists of a narrow stalk and a 
distal expanded bulb. The seminal receptacle is either homogeneously 
sclerotized or the bulb is slightly less sclerotized than the stalk. 
Aliatypus stalks are usually sinuous, frequently even highly looped or 
coiled. These loops and coils are not confined to a single plane and 
are often irregular so that the degree of looping or coiling is very 
difficult to quantify. It is, however, possible to make a rough quanti- 
tative comparison by counting the number of bends per stalk, as is 
done in Figure 163, when the stalk is treated as a two-dimensional 
structure. 
Abdominal tergites. The anterior portion of the abdominal dorsum 
of Aliatypus is provided with one or more segmentally arranged, 
rather heavily sclerotized patches which are presumably vestigial ter- 
gites (Figs.45-49) . These tergites are numbered from anterior to 
posterior, tergite I , ter git e II , and ter git e III. Tergite II is always 
present in both sexes and is always larger than tergites I or III. 
METHODS OF PRESENTATION 
Type specimens. The holotypes of all species described in this 
paper are deposited in the Museum of Comparative Zoology. All 
paratypes are from the type locality and are labeled as paratypes. 
The paratypes for each species are deposited in about equal numbers 
in the Museum of Comparative Zoology and the American Museum 
of Natural History. Quantitative character values are given for each 
holotype in Table 3. 
Key. Whenever quantitative characters are used in the key, the 
known range of values is used. Proceed cautiously when these 
ranges are based upon very small samples. Sample size for each spe- 
cies is given in Tables 1 and 2. 
Diagnoses. Each diagnosis lists, in the approximate order of their 
usefulness, those characters most useful in identifying a given species. 
