84 2002. The Journal of Arachnology 30:84–97 NEW SPECIES OF EREMOBATIDAE (ARACHNIDA, SOLIFUGAE) FROM NORTH AMERICA Jack O. Brookhart and Paula E. Cushing: Department of Zoology, Denver Museum of Nature and Science, 2001 Colorado Boulevard, Denver, Colorado 80205-5798 USA. E-mail: joipbroo@ix.netcom.com ABSTRACT. Five new species of Solifugae are described from North America: Eremobates chihuaen- sis, Eremobates gerbae, Hemerotrecha sevilleta, Hemerotrecha cornuta, Eremochelis oregonensis as well as the females of Eremocosta gigasella (Muma, 1970), and Eremobates polhemusi Muma & Brookhart, 1988. Keywords: Taxonomy, solpugida, camel spiders, sun spiders, wind scorpions The solifuges of North America are among the best known in the world due to the exten- sive publications of the late Martin Muma. The last major taxonomic publications dealing with North American solifuges (Muma 1987, 1989; Muma & Brookhart 1988) raised the number of named taxa in U.S.A. and Canada to 175 species in 10 genera, of which four genera belong to the Ammotrechidae (Am- motrecha Banks, Ammotrechella Roewer, Am- motrechula Roewer and Branchia Muma) and seven belong to the Eremobatidae (Eremoba- tes Banks, Eremocosta Roewer, Eremorhax Roewer, Horribates Muma, Chanbria Muma, Eremochelis Roewer, Eremothera Muma, and Hemerotrecha Banks). Despite this impressive tally, new species are constantly being discovered, and our ex- amination of material from Sevilleta Long Term Ecological Research Site (LTER), So- corro County, New Mexico, along with ma- terial collected by the authors and material sent for inspection from various institutions has identified five new eremobatid species and the first females of Eremobates polhemusi Muma & Brookhart 1988 which had been de- scribed from a single male, and Eremocosta gigasella Muma 1970 which had been de- scribed from several males collected in Texas and Mexico. Descriptions of these species are presented below. METHODS Measurements were made using the meth- ods described by Muma (1951, 1962 & 1970) and Brookhart & Muma (1981). Microscopic measurements were made at 25x using a Bausch and Lomb Stereozoom 7 binocular microscope. A glass slide was lightly pressed across the structures of smaller specimens in order to impose a level plane of measurement. This was particularly useful in measurements of the propeltidium and the female genital operculum. Gross measurements using a plas- tic ruler were made to the nearest 0.5 mm. Measurements using the ocular micrometer were made to the nearest 0.1 mm. Drawings were made using a camera lucida mounted to an Olympus S7H binocular microscope. Mea- surements given in the description are in mil- limeters. Paratype measurements are given as ranges where appropriate. Ratios listed below were used as described in Muma (1951), Brookhart & Muma (1981), and Muma & Brookhart (1988). Diagrams illustrating the method of measurement can be found in Muma & Brookhart (1988). Additionally we used the ratio of chelicera width to width of fixed finger in those species in which the fon- dal notch was absent or obscure. Abbreviations: PT = principal tooth; AT = anterior tooth; MT = medial tooth; IT = in- termediate tooth; MST = mesal tooth; PL = propeltidium length; PW = propeltidium width: CL = chelicera length; CW = chelic- era width; FFW = fixed finger width; FL = fond length; FW = fond width. Ratios: A/CP: The sum of the lengths of the palpus, leg I and leg IV divided by the sum of length of the chelicera and propeltidium in-