chamberlin: geophiloidea of the southeastern states. 417 



Key to species. 



a. Ventral pores in a median longitudinal lanceolate area, the apex 

 cephalad. A. unaster Chamberlin. 



aa. Ventral pores not in a median longitudinal lanceolate area. 



b. Ventral pores in a transverse area extending across the plate, 

 or nearly so, in front of caudal edge. A. bipuncticeps (Wood). 



bb. Ventral pores in a median circular or subcircular area. 



A. watsingus, sp. now 



Arenophilus unaster Chamberlin. 

 Ann. Ent. soc. America, 1909, 2, p. 179. 



Locality. — Austin, Texas (J. H. Comstock and T. H. Mont- 

 gomery, coll.). 



While not actually taken within the region strictly covered by the 

 present paper, it is likely to occur and is introduced in the key for 

 purposes of comparison with A. bipuncticeps, and others, with which 

 it is very closely related and perhaps cognate, A. watsingus also bear- 

 ing a similarly close relation. G. aster is a large form conspicuously 

 different from these related forms in the arrangement of the ventral 

 pores. These occur on the anterior ventral plates in the form of a 

 lanceolate area with the point cephalad, the area extending from the 

 caudal margin the greater distance across the plate. All Texas speci- 

 mens which I have seen are very constant in this character. A. 

 unaster appears completely to replace bipuncticeps and watsingus in 

 this region where it seems to be abundant. 



Arenophilus bipuncticeps (Wood). 



Geophilus bipuncticeps Wood, Journ. Acad. nat. sci. Phil., 1862, 

 ser. 2, 5, p. 45. Trans. Amer. philos. soc, 1865, new ser., 13, p. 180. 



? Geophilus attenuatus Say, Journ. Acad. nat. sci. Phil., 1821, 2, 

 p. 114. Bollman, Proc. U. S. N. M., 1889, 11, p. 347; Bull. 46, U. 

 S. N. M., 1893, p. 14. 



Geophilus gcorgianus Meinert, Proc. Amer. philos. soc, 1886, 23, 

 p. 219. 



Geophilus latro Meinert, Myr. Mus. Haun., 1871, 1, p. 79. 



Schendyla t perforatus McNeill, Proc. U. S. N. M., 1887, 10, p. 325. 



