THE LITHOBIOMORPHA OF THE SOUTHEASTERN 



STATES. 



By Ralph V. Ch\mbi:ri.ix, 

 Provo, Utah. 



In this paper is summarized our present knowledge of the 

 genera and species of the Lithobiomorpha occurring in the 

 extensive region lying south from Kentucky and the Virginias 

 and east of the Mississippi river. The great majority of the 

 records given are based upon collections made by the author 

 himself in the summer of 1910, during which season all 

 of the states in the territory indicated, excepting Florida, 

 were visited. The southern portion of Georgia and the coastal 

 region of this state and of the Carolinas were not covered. 

 Some species additional to those here listed are likely to be 

 found in these sections. The season was favorable for mem- 

 bers of this group; and it is felt that the great majority of the 

 more widespread forms were secured. In this connection it 

 may be noted that in the case of most of the species specimens 

 were taken in a considerable number of localities and that all 

 the species previously recorded were again found excepting 

 two from southern Georgia and Florida, where, as before 

 mentioned, collections were not made. 



Of especial interest are the genera Buethobius and Wato- 

 bius, here erected for the first time, and Zygethobius, previously 

 established by the author for a species occurring in the high 

 mountain ranges of the western Unites States. The finding 

 of a second species of Zygethobius in the mountainous section 

 of this southeastern region fulfills what had been anticipated 

 as likely. The three genera named are annectant and must 

 alter to a considerable degree some prevalent conceptions 

 as to affinities within the suborder. The genera recognized 

 in the present paper may be separated as follows: 



KEY TO GENERA, 

 a. Legs bearing bristles only, no articular spines present excepting sometimes one 

 at distal end of tibia of all but last pairs of legs but this usually re- 

 placed by an acutely pointed process. 

 b. First leg-bearing segment with a pair of spiracles. 



c. A single pair of ocelli ; tarsi of first thirteen pairs of legs undivided, 

 those of the last two pairs Inarticulate. . . Lamyctes Meinert. 

 bb. First leg-bearing segment without spiracles. 



c. Tarsi of first thirteen pairs of legs undivided, those of the last 



two pairs biarticulate; ocelli none 



Buethobius gen. nov. 



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