210 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io8 



The Tennessee specimens agree closely with the subspecies as 

 defined by the drawings. Those from Alabama, however, tend to 

 approach P. c. retrorsus both in size and gonopod characters, and the 

 specimen talven by Hubricht near Limrock is so thoroughly inter- 

 mediate in characters that it might easily be considered closer to 

 retrorsus than to laticoUis. It seems probable that the specimens 

 reported (Loomis, 1943) as retrorsus from Madison County, Ala., 

 are actually referable to laticoUis on the basis of their provenance, 

 somewhat west of Jackson County. 



Pachydesmus crassiciitis hubrichti, new subspecies 



Figures 5,c,d, 10,a, 11, a 



Type specimens: Male holotype (USNM 2272) from Tuscaloosa, 

 Tuscaloosa County, Ala., collected Mar. 30, 1948, by George E. Ball; 

 two female paratypes (USNM 2272) collected at Woodstock, Bibb 

 County, Ala., May 4, 1953, by Leslie Hubricht. 



Diagnosis: A large form (more than 70 mm. long) characterized 

 by the short, distally subdeltoid tibiotarsus of the male gonopod, 

 as well as by the very large subterminal tooth of the secondary 

 tibiotarsus. 



Description of holotype: Length of body, 71 mm., width of 

 midbody segment, 15.5 mm. Segments 4-16 of about equal width. 



Front of head smooth and polished, evenly convex except for a 

 distinct subtriangular flattened clypeal area. Geuae large, extending 

 well beyond lateral edge of head capsule, each with a prominent broad 

 median impression. Vertigial groove distinct, becoming more so 

 anteriorly, terminating in a small bipunctate depression centered 

 between the antennae. Two paramedian frontal setae, two sub- 

 antennal setae, and four supra-antennal setae present. Antennae 

 widely separated at base by a distance slightly greater than length of 

 2d antennal article. Antennae long, extending back to middle of 3d 

 tergite. The 2d, 3d, and 6th articles similar in size and shape, 4th 

 and 5th slightly shorter. The 7th article hemispherical, with four 

 sensory cones. 



Collum large, 5.0 mm. long at middorsal line, almost 2 mm. wider 

 on each side than following tergite, the lateral ends strongly narrowed 

 and bent cephalomesiad, entirely concealing base of mandibles when 

 head is depressed. Surface of collum polished, the disk with very 

 fine scratches, becoming coriaceous toward the ends. Anterior edge 

 straight, margined up as far as base of mandibles. Posterior edge 

 straight across back, thence abruptly and sinuously swept forward. 



Paranota of first eight segments swept forward, their corners 

 broadly rounded, those of segments 8-15 transverse, those of last 

 segments becoming increasingly produced caudad. Paranota narrow, 



