73 



DESCEIPTION. 



The body is elliptical, broadly and equally rounded at both ends, 

 nearly circular in transverse vertical section, distinctly segmented ; 

 surface covered with a waxy bloom, smooth except for a few small 

 hairs at the anal extremity. Feet, eyes, and antennae minute. The 

 body is .11 of an inch long, a little more than half as wide, and a 

 little less than half as deep ; the abdomen decidedly shorter than the 

 head and thorax ; the antenuse .003 of an inch long, their length 

 less than the distance between their bases, obscurely seven-jointed ; 

 the first joint as wide as long; the second a little shorter and much 

 narrower than the first ; the third and fourth a little smaller than 

 the second and not distinctly divided ; the fifth and sixth distinct, 

 equal in length, and about equal to the first ; the seventh long, 

 cylindrical, equal to the two preceding, obtusely pointed at tip. 

 Entire antenna minutely sparsely hairy under a high power. Eyes 

 simple, consisting of a single ocellus and a black speck on the side 

 of the head, directly behind the antenna, the third joint of which 

 will about reach them. 



Legs .01 of an inch in length, each reaching about one half way 

 to its fellow of the opposite side. Tarsus one-jointed, as long as the 

 tibia, tapering regularly, terminating in a single stout curved claw; 

 tibia and femur of about equal length ; trochanter as long as the 

 coxa. Legs very minutely sparsely hairy throughout. Rostrum very 

 minute, in the form of a thick tubercle projecting downwards in 

 front of the bases of the anterior legs, scarcely longer than wide, 

 about half the length of the femur. 



3. Cloter MlTes. 



At Normal, early in May, the general occurrence of a large and 

 conspicuous brownish red mite was noticed upon clover and blue 

 grass, the former of these plants, especially, sometimes suffering 

 severely from the pest. The leaves of the clover turned yellow and 

 their growth was arrested where the mite was abundant. The effect 

 upon the blue grass was similar. The species, which proved to be 

 new, is here described by my first assistant, Mr. H. Garman. 



Bryobia pratensis, n. s., H. Garman. 



(Plate VI. Fig. 7.) 

 Body oval in outline as seen from above or below ; but little 

 elongated. Outline as seen from the side also oval, increasing in 

 depth towards the posterior extremity where it is abruptly truncated. 

 Strongly convex above, much less so below. Entire surface rugose 

 with more or less parallel, w'aved striae. Strise of dorsal surface of 

 abdomen coarser and more regular than those of the ventral surface 

 and of the cephalothorax. 



With scattered, curved, finely denticulate, scale-like appendages 

 attached to the dorsum and at the margins. These scales expand 

 uniformly from their bases to their tips, where they are widest and 

 have slightly rounded denticulate margins. The four conical promi- 

 nences which extend forward over the mouth parts at the anterior 

 extremity of the cephalothorax, each bears one of these scales. The 



