. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 288 Bulletin Museum of Comparative Zoology, Vol. 149, No. 5. Map 2. Distributions of Tetragnatha nitens (Audouin), T. earmra n. sp., 7". guatemalensis O. , T. extensa (Linnaeus), and T. dearmata Thorell in North America. Tetragnatha to catch flies without the use of webs. Key to Species. The distance of the lat- eral eyes from each other compared to the distance of the median eyes is an easy character to see. The distance is mea- sured from the center of the eyes. Unfor- tunately there is considerable
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 288 Bulletin Museum of Comparative Zoology, Vol. 149, No. 5. Map 2. Distributions of Tetragnatha nitens (Audouin), T. earmra n. sp., 7". guatemalensis O. , T. extensa (Linnaeus), and T. dearmata Thorell in North America. Tetragnatha to catch flies without the use of webs. Key to Species. The distance of the lat- eral eyes from each other compared to the distance of the median eyes is an easy character to see. The distance is mea- sured from the center of the eyes. Unfor- tunately there is considerable variation, especially in the commonest species, T. laboriosa. While in most specimens of this species the lateral eyes are slightly closer together than the medians or an equal distance apart, in a very rare spec- imen the eyes are very slightly farther apart. Key to Female Tetragnatha North OF Mexico 1. Lateral eyes farther apart than medians (Figs. 130, 141, 150, 159, 168, 177) 2 Lateral eyes as far apart as medians or closer together (Figs. 24,36,75, 111) -— 7 2(1). Abdomen with a tail extending beyond spinnerets (Figs. 140, 167) 3 Abdomen without a tail (Figs. 129, 176) 4 3(2). Anterior median seminal receptacles closer to each other than to other mem- ber of pair (Figs. 142, 143); Canada, Northwest, eastern states (Map 4) caudata Anterior and posterior seminal recep- tacles on each side next to each other (Figs. 169, 171); New England to Gulf Coast (Map 4) branda 4(2). Abdomen only silver on dorsal half, edge of silvery area forming a lateral line with area below lacking silver pig- ment (Fig. 149); seminal receptacles on each side about 1 to 2 times their diameter apart and connected by a stalk (Fig. 153); Alberta, Utah, and East (Map 4) straminea. 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 Har
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