430 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



Discussion. — Both Blatchley and Hussey, in the citations hsted 

 above, reported taking this species from the ground under leaves or 

 other debris. Specimens examined bore the notations "in woods trash" 

 and "Berlese funnel material, in dry magnolia-hickory hummock." 



The four species that run through the first half of the first couplet 

 of the key to species form a closely knit unit that probably deserves 

 taxonomic recognition of some sort, perhaps as a subgenus. This 

 group would be characterized by the small, triangular terminal process 

 of the osteolar peritreme which is separated from the lateral edge of 

 the evaporatorium by a space greater than the transverse width of 

 the process, and by the thick, calloused margins of the head, with the 

 incomplete, submarginal, dorsal carma. Since three of the four 

 species which would be included in such a group are represented 

 by only one specimen in the material studied, the author hesitates 

 to make such a division at this time. 



Melanaethus crenatus (Signoret), revived conibinalion 



Plate figure 209 



Geotomus (Melanaethus) crenatus Signoret, 1883, p. 208, pi. 4, fig. 171. 



Melanaethus crenatus Uhler, 1880, p. 3. 



Geotomus crenatus Lethierry and Severin, 1893, p. 72. 



Diagnosis. — Among those species of the genus with the large 

 terminal lobe on the peritreme this one may be recognized by the 

 distinctly alutaceous coria. 



Description. — Male: Elongate-oval, sides subparallel. 



Head: Length about two-thirds of width, 0.56(0.54-0.60) :0. 81 

 (0.80-0.82); interocular width, 0.56(0.55-0.60); anterior outline a 

 more or less truncated semicircle, clypeus as long as juga, narrowed 

 apically; dorsum densely and in part confluently punctate; with 

 distinct marginal carina dorsally; ocelli very small, separated from 

 eye by space more than three times transverse ocellar width; jugum 

 ventrally shining; maxillary plate punctate. Antennal segments: 

 I, 0.16(0.15-0.19); II, 0.16(0.16-0.18); III, 0.19(0.17-0.20); IV, 

 0.25(0.23-0.26); V, 0.33(0.33-0.35). Bucculae higher than labial II, 

 abruptly terminated posteriorly; labium attaining bases of middle 

 coxae. Labial segments: I, 0.22(0.20-0.23); II, 0.44(0.37-0.50); III, 

 0.30(0.27-0.33); IV, 0.25(0.22-0.26). 



Pronotum: Length more than lialf width, 0.67(0.64-0.70) : 0.91 

 (0.86-0.93); anterior margin moderately, singly emarginate; lateral 

 margin nearly straight and subparallel on basal half, without setigerous 

 punctures submarginally ; transverse impression weak to obsolete, 

 postmedian, without a special line of coarser punctures marking it; 

 anterior lobe with numerous prominent punctures laterally, sub- 

 apically and medially, calli poHshed, with several scattered, finer 



