. Brigham Young University science bulletin. Biology -- Periodicals. Biological Series, Vol. 5, No. 4, February, 1965 39 Lateral projections of basis capituli ta- pering narrowly, ending in acute lateral points (best observed on unmounted specimens). Spurs on coxae II and III submarginal D. halli (See figure 16) Known only from south-cential Texas and Mexico. Very little is known of natural ecology. Lateral projections of basis capituli not narrowly tapering but ending sub- acutely. Spurs on II and III mar- ginal. (Couplet illustration shows dorsal and ventral views of basis capituli an
. Brigham Young University science bulletin. Biology -- Periodicals. Biological Series, Vol. 5, No. 4, February, 1965 39 Lateral projections of basis capituli ta- pering narrowly, ending in acute lateral points (best observed on unmounted specimens). Spurs on coxae II and III submarginal D. halli (See figure 16) Known only from south-cential Texas and Mexico. Very little is known of natural ecology. Lateral projections of basis capituli not narrowly tapering but ending sub- acutely. Spurs on II and III mar- ginal. (Couplet illustration shows dorsal and ventral views of basis capituli and lateral points.) Best observed in un- mounted specimens 3. 3. Spur on coxa I broadly tapered and sub- acute D. parumapertus (See figure 28) Known from lowlands of southern Idaho, southeastern Oregon, east of the Sierra Nevada mountains in California, all of the lowlands of Nevada, Utah, western Colorado, Arizona, New Mexico, western Texas, western Okla- homa, and nordiem Mexico. The larval stage is found on practically all the smaller verte- brates distributed in the areas above. The adults are almost invariably found on the Black- tailed jack rabbit, Lepus calijornicus, but at certain seasons adults, nymphs, and larvae may be taken from this host. This is without doubt the most abundant Dcrmacentor tick distributed in the lowland regions of the Great Basin states. Spur on coxa 1 moderately tapered 4. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Brigham Young University. Provo, Utah : Brigham Young University
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