52 



tips, where they are widest and have slightly rounded denticulate margins. The 

 four conical prominences which extend forward over the mouth parts at the anterior 

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

 prominences are longest, and are united at their bases. Palpi very stout; the 

 basal articles with a few long hairs; inner ramus of forceps thumb-like and with 

 spinose hairs ; outer ramus a strongly curved hook. 



Legs with strong, plumose, spine-like hairs on their basal articles, which hairs 

 grow less and less stout towards the distal extremity of the limbs until upon the dis- 

 tal articles they form long, slender sette. Anterior legs equal to the body iu length, 

 tapering but slightly to the distal extremity. Two basal articles about equal, the 

 proximal slightly the longer. Third article longest, twice the length of the sixth. 

 Fourth article nearly as long as the sixth, about half the length of the fifth. Adhe- 

 sive hairs fewer and more slender than those of the other legs. Legs of the three 

 posterior pairs much shorter than the anterior, and with less difference in the lengths 

 of the articles composing them. 



The eyes consist of two approximated ocelli on each side of the cephalothorax. 

 Adults in life marked with red and black. The pattern has been destroyed by alco- 

 hol. The majority of those examined have large anal protuberances. 



Length of body .038 inch ; width of same .025 inch. 



With the above, another mite, similar but paler and smaller, was frequently 

 taken in meadows. It is thus described by Mr. Garman : 



Bryobia pallida, n, s., H, Garman. 



A small, 1 alb species agreeing with B. pratensis in general form. Anterior legs 

 slightly longer than the body, with the fourth article markedly shorter than the sixth. 

 Scale-like appendages somewhat wider and shorter proportionally. Two outer of 

 the frontal processes wider at their tips than those of B. pratensis. Median pair of 

 processes more slender than the outer and united forhalf their length. Color, whitish. 

 Length of body .024 inch ; width of the same .015 inch. Occurs with the preceding 

 on grasses in meadows. The anal protuberance is conspicuous in most of the exam- 

 ples seen. 



Additions to Description of Adult.— Ijength, 0.70 to 0.82™°!.; width, 0.55 to 0.57°ii». ; 

 in specimens collected in fall and winter, the dorsum is concave, slightly elevated to- 

 ward the middle, the lateral edges being quite sharp, and even in the most distended 

 specimens this appearance is not entirely obliterated. The rami of forceps may be 

 best described as upper and lower, the hook being above ; in mounted specimens their 

 position is frequently as shown at Fig. 4, c, with the hook forming apparently the in- 

 ner ramus. 



" The long set*" of the distal articles of the legs are prominent only in the case 

 of the first pair of legs ; with the following pairs the hairs on the last articles ap- 

 proach more nearly those of the other joints ; with the exception, however, thatfrom 

 near the tip of the outer side of the distal article of each leg spring two long, curved 

 hairs, in length more than one- half that of the article, and these prominent hairs 

 occur also in the earlier stages of the insect. 



The comparative length of the six articles of the anterior legs may be shown by 

 the following numbers, counting from the basal article : 4, 2, 20, 8, 16, 9. 



There is in different specimens a slight variation in the length of the articles, but 

 their relative length is practically uniform. The eyes, as already indicated for the 

 larva, are situated in a triangular reddish-purple spot, from which they probably 

 take their color by reflection, since when viewed from the side they are colorless. 

 Color : Abdomen dors;ilIy, central spot on the hind margin of the cephalothorax and 

 a lateral oblique mark directed forward, purplish-black ; anterior and lateral portions 

 of cephalothorax, lateral edge and sometimes central dorsal portion of abdomen, 

 sternum and legs vermilion. 



Projecting ventral (anal) portion of abdomen large, and with prominent triangular 

 or oval anal opening (Fig. 4, b). 



The position of the scale- like appendages of the adult agrees with those of the 

 larva, with the exception that the place of the anterior pair of spines of the larva is 

 taken by the projecting scale-bearing appendages of the cephalothorax of the adult. 



The character of these scales is shown in Fig. 4, i, from the outer cephalothoracic 

 prominence^" from the inner and h from body. 



