. Brigham Young University science bulletin. Biology -- Periodicals. Fig. 13. Dorsal view of fully engorged nymphal O. lag- ophilus. Spines are present over entire body surface and not just around margins as shosvn. palpal setae, and three pairs of posterior central capitular setae. The palpi are moderately heavy with article I lacking a ventral swelling. Palpal setae are small and few in number. The hjpo- stome is large, w ith the sides nciuh' parallel. The denticles are long and sharp and in a 3/3 ar- rangement. Other features are a pair of circular, mildlx convex spiracles in the same posit
. Brigham Young University science bulletin. Biology -- Periodicals. Fig. 13. Dorsal view of fully engorged nymphal O. lag- ophilus. Spines are present over entire body surface and not just around margins as shosvn. palpal setae, and three pairs of posterior central capitular setae. The palpi are moderately heavy with article I lacking a ventral swelling. Palpal setae are small and few in number. The hjpo- stome is large, w ith the sides nciuh' parallel. The denticles are long and sharp and in a 3/3 ar- rangement. Other features are a pair of circular, mildlx convex spiracles in the same position as in adults (Figure 30), and a postero\cntrally placed anus. The anus has no true grooves around it, but pre- anal and median postanal grooves are indicated CHELICERAL DIGIT CHELICERAL SHEATH HYPOSTOME DENTICLE FILE I DENTICLE FILE 2 DENTICLE FILE 3 PALPUS POSTHYPOSTOMAL SETA POSTPALPAL SETA BASIS CAPITULI POSTEROCENTRAL CAPITULAR SETAE Fig. 14. view of capittiluin nt ii\ iii| O. la;: by shallow, elongated depressions. A genital aperture is not present in tlic nymph. Larval Characters of O. lagophilus. The following description of the laiva is suggest- ed by the studies being conducted b)' Clifford, Kohls and Sonenshine (Clifford, Kohls, and Sonenshine, 1964; Kohls, Sonenshine, and Clif- ford, in press). See Figures 15 and 16 for label- ed illustrations of dorsal and \entral views of laboratory reared, unengorged Iar\ac. Figures 17 and IS showing dorsal and \entral views of unengorged lar\'ae are drawn to the same scale as Figiues 19 and 20, whicli are dorsal and ven- tral views of fully engorged specimens. These illustrations give a comparison of tlie size of unengorged with fully engorged specimens. However, these are not draw n to the same scale as iue the adult and nymphal illustrations. The integument, dorsal and \entral, is thin and striated. The dorsal plate is slightly wider anteriorly than posteriorly. Seven to nine pairs of dorsal setae a
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