. Brigham Young University science bulletin. Biology -- Periodicals. BlIIGIIAM VolNG I'siVERSI'n SCIENCE BULLETIN. Fig. 22. Dorsul and ventral views, female Dermacentor occidentalis. few yet distinct and constant in size. Cervical grooves short, broad and siiallow, extending fan-like posteriorlw Coxae: Coxa I witli opposing margins of in- ternal and external spurs parallel. Kxferiial spurs on coxae II, III, and \\. acute to suh-acute. In- ternal spurs present on coxae II and III. mar- ginal and broadly rounded. Spiracular plate: Inner and posterior mar- gins straight. .Short dorsal prolongatio
. Brigham Young University science bulletin. Biology -- Periodicals. BlIIGIIAM VolNG I'siVERSI'n SCIENCE BULLETIN. Fig. 22. Dorsul and ventral views, female Dermacentor occidentalis. few yet distinct and constant in size. Cervical grooves short, broad and siiallow, extending fan-like posteriorlw Coxae: Coxa I witli opposing margins of in- ternal and external spurs parallel. Kxferiial spurs on coxae II, III, and \\. acute to suh-acute. In- ternal spurs present on coxae II and III. mar- ginal and broadly rounded. Spiracular plate: Inner and posterior mar- gins straight. .Short dorsal prolongation present. Cohlet cells of moderate si/e. siiglitK snuiiicr than in the male. Macula large. Nymph (Figiue 2-3) Body: Idiosoma oval, anterolateral margins eveiilv tapering. Latiral gr<M)ve jjri'sent in un- engorged specimens. Length: Maximum, ; minimuM), ; mean. Width: .Maximum. ; minimum, ; mean, 0,82. Fig. 23. Dorsal and ventral views, nymplial Dermacen- tor occidentalis. Capitulum: Dorsal width slightly greater than length. Palps long and slender. Basis cap- ituli \\ith lateral points extending bevond apex of scapulae. .\nteroIateral margin of basis ir- regidarly cursed. Basal spurs postmarginal. Scutum: Kxtends posteriorly one-third to oni'-halt the length of the idiosoma. Cer\'ical grooves long, deepened anteriorly. Posterior margin cur\ed. Punctations absent. Coxae: C^oxa I with a medium-sized exter- nal spur and a marginal inti'rnal s\t\\T, External spurs present on coxae II ;ukI III. .\ slight mar- ginal projecting external spur may be present or absent on coxa I\'. Spiracular plate: Essentially oval, broadly cur\ed \cntrallv and tapering dorsallv to a dis- tinct apex, Coblet cells moderately small. Ring of slightly larger goblet cells adjacent to the orifice. Macula 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 m
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