. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. NeARCTIC DOLOMEDES SpiDERS • CaiicO 471 (Figs. 23-24). Females show a similar t\ pc of \ariation of the carapacal band but the\- do not hax'e the wide, uniform band of the male, and oceasionally the light areas are almost obsolete (Fig. 22). Correlating with the decrease in light areas of the carapacal band is i\\v decrease in light areas of the abdominal dorsum. Especialb affected are the lateral light mottled areas of the female w hich ma\" become a homogeneous medium gra)'. Likewise, the mak> shows a decrea
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. NeARCTIC DOLOMEDES SpiDERS • CaiicO 471 (Figs. 23-24). Females show a similar t\ pc of \ariation of the carapacal band but the\- do not hax'e the wide, uniform band of the male, and oceasionally the light areas are almost obsolete (Fig. 22). Correlating with the decrease in light areas of the carapacal band is i\\v decrease in light areas of the abdominal dorsum. Especialb affected are the lateral light mottled areas of the female w hich ma\" become a homogeneous medium gra)'. Likewise, the mak> shows a decrease in the width of the lateral light bands, Init tlic transverse bands are always in evidence ill both sexes. In older specimens the chelicerae. palpal cndites, and labium ma\" be quite dark. In the nortli. the general color ma\ be darker. The lateral parts of the "W'-sliaped" transverse abdominal bands are lighter and appear as distinct white marks. An interesting light male variant from the Rio Grande \'alle\', pre\iousl\- called D. pinicola, was discussed in the "Variation" section of D. alhineiis. Natural Jiistonj. From personal obser- \'ation and data from collections made b\' other collectors, it is clear that this species is most commonly found associated with moderate to fast mo\ing streams. In the Appalachians they are very common among rocks and boulders located at the margins of or in the stream itself. They are also found among piles of dead sticks and lea\es washed up along the stream margin. Their general gra\ ish color and complex pattern blend quite well with tlie gray of rocks and weathered wood. D. scriptus is often found associated with D. cittatus, and their eco- logical relationship was discussed aboxe in the section on the biologx' of the genus. During the month of August and the first part of September, females with egg sacs are encountered and nurseries are common along stream banks. Occasionalh- females with egg sacs ha\'e bee
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