NKW AMKHICAN ACAKIXA. 217 



ICIiyiicolopliiiw tt'XsiiiiiM iiov. s|i.— LfiiKtli 1.9 mm.; lej; i, 2. mm.; ]vg 

 iv, 2. mm. — Similar to R. maculatus, but has a longer, more slender body; the 

 last joint of leg i nearly as long as the preceding; the body thickly clothed 

 with short hairs like those of R. maculatus, but without smooth patches; the 

 dorsal groove is exceedingly long, reaching from the anterior end of the body 

 to the middle of the dorsum. 



Texas. 



RliyiieoIophiiK piioNiis nov. sp. — Length 1.4 mm.; leg i, 1.4 mm. ; leg 



iv, 1.4 mm. lied ; l)o(ly oblong, more slender than other species, rounded behind, 

 widest at middle and tapering to the head ; groove short, only reaching as far as 

 eyes. Body covered witli quite long, stiff hairs. Legs short; last joint of leg i 

 a little over half as long as the preceding; last joint of leg iv about half the 

 length of the preceding joint. 



Sea Clifi", N. Y., in ino-ss. 



TETRANYCHID^E. 



These are spinning mites found .siiclviiig the leaves of phmts. They 

 are iniich smaller than the other members of this super-family. The 

 palpi are short and stout, with a short appendage ; the eyes sessile, 

 and the surface of the cephalothorax continuous with that of the 

 abdomen. The posterior pairs of legs are some distance behind the 

 anterior pairs; they are all short, and the tarsi are never enlarged, 

 as is common in the two preceding families. Two genera are known 

 from the United States: 



First pair of legs longer than the body Bryobia. 



First pair of legs shorter than the body 'rotraiiyeliiiM. 



One species of Bryobia {B. pratensU Garnian) is quite common 

 in the United States. I have taken it at Washington, D. C, and at 

 Sea Cliff, N. Y. B. pallida Garman is probably the voung of B. 

 pratetisis. Good figures and description are found in " Insect Life," 

 vol. iii, No. 2, p. 45. 



Of Tetranychnx, many s|)ecies doubtless occur in the United States. 

 The form sometimes seen on household plants and called the " red 

 spider," has been referred to the Euro})ean T. telnrinx, but I do not 

 know that specimens have been compared with the Kuropean form. 



Dr. Riley has described, in his annual report for 188!*, a new sj)e- 

 cies found on the orange, T. sexmacidatus. Another species is found 

 quite commonly on cotton, and is figured by Glover. 



I have collected a species on the leaves of the jtucan tree, which 

 may be called 



TKANS. AM. ENT. SOC. XXI. (28) JUNE. 1894. 



