128 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lu 



Patterson and J. M. Schmidt (Chicago Nat. Hist. Mus.). Val Verde County: 

 3.3 miles northeast of Pandale, June 11, 1955, Leslie Hubricht (USNM), 



Comanchelus, new genus 



Type species: Comanchelus hubrichti, new species. 



Diagnosis: A eureline genus in which the tarsal claws of the 

 anterior legs are not reduced, and the coxal lobes, if present, are 

 simple with usually only those of the third leg pair enlarged. Sternite 

 of the anterior gonopods nearly transverse; sternal apodemes not 

 completely fused to the coxites on the caudal side (fig. 6,6). 



Discussion: This genus is proposed for two species which although 

 generally similar to Eurelus soleatus appear to diverge enough to 

 justify their recognition as a separate group. The number of segments 

 is about the same as in soleatus (45 to 52), but the species appear to 

 average somewhat smaller in size. Probably the most rehable means 

 of recognizing the genus will be found in gonopod characters. 



In addition to the type species, we tentatively refer here the form 

 named Toltecolus chihuanus by Dr. Chamberlin (1947a). As far as 

 can be ascertained from the original description and illustrations, the 

 species appears to be closely related to C. hubrichti, but a careful 

 study of the gonopods of chihuanus is needed for a final confirmation 

 of its systematic position. 



Comanchelus chihuanus (Chamberlin), new combination 



Toltecolus chihuanus Chamberlin, 1947a, p. 10, figs. 5-7. 



Holotype: Male, collection of R. V. Chamberlin, from Chihuahua 

 City, Chihuahua, Mexico, collected on July 23, 1944, by V. E. Shelford. 



Diagnosis: The coxae of the third leg pair are produced into 

 elongated, cylindrical lobes. Posterior gonopods with a rounded 

 subterminal lobe on the caudomesial margin instead of a laminate, 

 acutely projecting blade as in C. hubrichti. 



Description (from Chamberlin): 



Color a dark, olive gray, with dark annuli about caudal borders of metazonites. 

 Legs dark chestnut. 



Clypeal foveolae 5 + 5. Eyes very widely separated; ocelli arranged in 

 8 longitudinal series and the same number of transverse series. 



Collura strongly narrowed down each side as usual, with the anterior margin 

 conspicuously incurved at lower end, the elevation decreasing dorsad, the elevated 

 border set off by a sulcus (fig. 5). 



Segments smooth above. A true segmental sulcus absent above, though below 

 indicated by a famt line which bends forward angularly at level of pore which it 

 touches. Segments strongly striate below. Anal tergite rounded behind, the 

 surface over caudal portion irregularly rugose. 



In the male the first two pairs of legs are thickened and have the claws strongly 

 enlarged. The claws of the following three pairs of legs also have enlarged claws 

 but these decreasing from third pair to fifth. 



