12 NATHAN BANKS. 



BEL.BA Koch. 

 No tectal plate, no wings to abdomen, tarsi with but one claw, no 

 wing-like expansions to cephalothorax ; legs long and slender, the 

 hind pair as long as body, the joints nodulate and with sinijile hairs, 

 the ventral apertiu'es in the typical forms are widely separated. 



Abdomen smooth, veutral apertures widely separated iliiiiuta. 



Abdomen minutely spiuulate, ventral apertures approximate aiiJiitralis. 



BelbiH ininuta nov. sp. — Length .45 mm. Yellowish brown cephalothorax 

 convex, triangular, two anterior bristles ; two superior bristles erect, shorter than 

 the long, slightly clavate seta; ; abdomen elliptical, convex, smooth, with about 

 fifteen prominent bristles above ; venter smooth, genital opening fully twice its 

 length in front of the much larger anal opening ; anterior coxse free, the posterior 

 pairs united into a plate without any line or spot on the sides ; legs slender, the 

 posterior pair as long as the body. 



Sea Cliff, N. Y. ; Chicago, 111. ; Ft. Lee, N. J. This very com- 

 mon mite is chiefly in decaying animal sul)stances, l)ut it frequently 

 occurs in moss, under bark, on the ground, etc. 



Belba australis nov. sp. — Length .6 mm. Eed-brown, trochanters and 

 femora darker ; cephalothorax quite high, two pairs of curved bristles in front, a 

 pair of bristles a little in front of and shorter tlian the setse, the latter are very 

 long and not clavate. the stigmata prominent ; the abdomen is high, convex and 

 minutely spinulate above, and with about a dozen stitf, strongly curved bristles ; 

 venter smooth, genital opening barely separated from the anal opening; coxse 

 united into a large plate with two lines each side ; legs slender, the posterior pair 

 longer than the body. 



One specimen, Shreveport, La. This species might form a sepa- 

 rate genus on account of the position of the genital opening, the 

 simple setce, and the structure of the coxse. 



CARABOI>RS Koch. 



No tectal plate, but with a transverse crest in front of the stig- 

 mata giving rise each side to an elevated, often plate-like ridge ; 

 abdomen without wings, usually with clavate hairs ; legs shorter 

 than body, barely nodulate, provided with simi)le hairs ; each tarsus 

 with one claw ; genital and anal apertures usually ap])roximate. 

 1. — The genital opening far in front of anal opening oblonga. 



The openings approximate 2. 



2. — Black, four rows of white scale-like hairs nigra. 



Yellowish, clavate hairs mostly at tip apicalis. 



Carabodes nigra nov. sp. — Length .5 mm. Black, legs yellowish or red- 

 dish ; cephalothorax broadly triangular, narrowed behind, a few hairs at tip ; 

 crest large, with two large spatulate white hairs above, and behind on each side a 

 circular elevated area which is minutely pitted ; the set* of stigmata quite long 



