. Fresh-water biology. Freshwater biology. A beautiful mite of striking form, being greatly compressed and actualiji concave dorsally; with swimming- hairs. Brightly and variously colored. One widely-distributed species, K. concava Wolcott, adapting itself to varied conditions, and often common. Of small size measuring to mm. in length. Fig. 1334. Koenikea concava Wolcott. Epimeral field and genital area, male. X 65. Inner side, palpus, male. X 278. Side view, capitulum and rostrum, female. X 277. (After Wolcott.) 30 (27) Rostrum short 31 31 (36) Suture between the dorsal and ventral p
. Fresh-water biology. Freshwater biology. A beautiful mite of striking form, being greatly compressed and actualiji concave dorsally; with swimming- hairs. Brightly and variously colored. One widely-distributed species, K. concava Wolcott, adapting itself to varied conditions, and often common. Of small size measuring to mm. in length. Fig. 1334. Koenikea concava Wolcott. Epimeral field and genital area, male. X 65. Inner side, palpus, male. X 278. Side view, capitulum and rostrum, female. X 277. (After Wolcott.) 30 (27) Rostrum short 31 31 (36) Suture between the dorsal and ventral plates continuous, completely enclosing the dorsal plate, or open posteriorly 32 32 (35) Acetabula lying near the genital cleft, no modification of leg IV in the male 2>^ 33 (34) Ep. IV quadrilateral in form Mideopsis Neuman 1880. A mite of bright colors, with body almost circular in outUne, slightly concave dorsally; a short rostrum; swimming-hairs; 3 acetabula on each side, outside of which are narrow, sickle-shaped flaps. One species, M. orbicularis (MuUer), common to Europe and America and widely distributed in this country. Of medium size averaging about i mm. in length. Fig. 1335. Mideopsis orbicularis (Miiller). Ventral sur- face, female. X 23. Outer side, right palpus. X123. (Modified from Xystonotus Wolcott 1900. Body elliptical; capitulum small and camerostom slightly developed into a rostrum; no swimming-hairs; 3 acetabula on each side, flanked by movable flaps. The genus containing a single species, X. asper Wolcott, known only from two female specimens from Michigan. Of small size, mm. long. Fig. 1336. Xystonotus asper Wolcott. Ven- tral surface, female. X 43- Outer side right palpus. X 195. (After Wolcott.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ward, Henry Baldwin,
Size: 1112px × 2248px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
