PROC. ENTOMOL. SOC. WASH. 85(4), 1983, pp. 811-817 MITES OF THE FAMILY PACHYGNATHIDAE (ACARI: ENDEOSTIGMATA) FROM TEXAS B. McDaniel and Eric G. Bolen (BM) Plant Science Department (Entomology), South Dakota State University, Brookings, South Dakota 57007; (EGB) Department of Range and Wildlife Man-agement and Dean's Office, The Graduate School, Texas Tech University, Lub-bock, Texas 79409. Abstract.— Three new taxa of Pachygnathidae were collected during an inves-tigation of the microarthropod fauna of the Southern High Plains and Gulf Coastal Region of Texas, Petralycus celtisacinus, n. sp.. P. caryapecaus, n. sp., and Bi-michaelia dimixsetosa texana, n. subsp. All three are described here. The two new species represent the first records of Petralycus from the Western Hemisphere. During an investigation of the microarthropod fauna of the Southern High Plains and Gulf Coastal regions of Texas, members of the family Pachygnathidae were collected; these included two new species of the genus Petralycus Grandjean (1943) and a new subspecies of Bimichaelia dimixsetosa McDaniel (1979). Petralycus Grandjean The genus Petralycus was, until the work of Theron (1977), known only from the nominal species P. unicornis Grandjean from France. Theron (1977) added two new species from South Africa, P. longicornis Theron and P. brevicornis Theron. In this paper two new species of Petralycus are described, extending the known distribution of the genus to include the United States. Setal nomenclature is after Theron (1977). Petralycus celtisacinus McDaniel and Bolen, New Species Figs. 1, 2 Description. — Dimensions: Length of body 246 mm; breadth of body 94 mm. Dorsum (Fig. 1): Palp 5-segmented, palptarsus with 7 plumose setae, 1 thickened solenidion, 2 slender terminal solenidia; palpal segment 4-2 with 2 plumose setae; segment 3 with a single plumose seta. Gnathosoma with both movable and fixed digits provided with denticles. Hypognathum provided with 3 small branched setae, peglike adoral setae not observed. Ectomalae well developed, elongate not thick-ened at terminal apex. Naso very long, longer than naso of P. longicornis, reaching to apex of propodosoma (Fig. 1). Propodosoma with 3 pairs of setae, ro, xa, and in, these plumose with in larger than xa and ro. Sensilla le globose, located above sensilla bo and below seta xa. Sensilla bo filamentous and finely ciliate. Apodomes of propodosoma similar to those found on P. unicornis Grandjean. Podosoma (excluding propodosomal region) and opisthosoma with 24 plumose setae. Setae
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