160 AMERICAN SPIDERS AND THEIR SPINNINGWORK. 



according to Cambridge, 1 the falces, legs, and lower part of the abdomen are orange, ap- 

 proaching light burnt sienna; on the abdomen, sharply outlined, bright green, metallic 

 when first caught, bordered anteriorly by a narrow white line, posteriorly by ten black 

 ocellse with clear white margins. 



CEPHAI.OTHORAX : Corselet well rounded ; orange brown ; the head depressed and covered 

 with white hairs. Sternum orange yellow, slightly pubescent, with low sternal cones before 

 coxw-III ; slightly elevated in the centre ; about as wide as long. The labium and maxillm 

 as in Epeira. 



LEGS: 1, 2, 4, 3, as follows: 23.1, 19.8, 17.1, ll.fi mm.; they range in color from light 

 yellow to light brown. The joints are annulated, with reddish brown color; armed with 

 bristles, and rather short spines. Palps as the legs. Mandibles long, conical, widely sepa- 

 rated at the tips. 



EYES : Ocular quad on a ronnded prominence, the sides but little longer than the front 

 (if any), and the latter wider than the rear; the four eyes about equal in size; MF sepa- 

 rated about 1.5 to 2 diameters ; MR separated one diameter. MF removed from SF about 

 1.3 alignment; SR from MR about twice their alignment; side eyes propinquate, about 

 equal in size. The front row of eyes is aligned, or but slightly recurved ; the longer 

 rear row procurved ; height of clypeus 2 to 2.5 diameters of MF. 



ABDOMEN : Almost as wide at the base as long, bluntly pointed in front, forming thus 

 a basal triangle. The dorsum is a rounded yellow triangle (in life green with metallic 

 lustre), in the middle of which is a brown folium scalloped or triangulated at the margin 

 and diminishing to the apex ; a row of brown bristles marks the base, and the dorsum is 

 covered with similar but shorter hairs with brown pits, which modify the color. On the 

 dorsal median, well towards the apex, are two circular prominences, corneous, shining, each 

 about one millimetre in diameter, and separated from each other about three diameters; 

 a light yellowish line girdles their point of union with the abdomen ; they appear like 

 blisters upon the surface ; are destitute of hairs. The venter is a broad patch whose margin 

 is yellow, enclosing a subtriangular patch of brown, the whole reticulated ; four brown dots 

 arranged in a square mark the anterior part near the gills ; spinnerets brown, surrounded 

 at their base by a yellow brown band. The epigynum has a long, straight, rugose scapus, 

 narrowing from the base towards the point (Fig. 5a) ; the base rather flattened, the apex 

 rounded. 



MALE : Fig. 6, 6a. About equal in length to the female, or a little longer. Cephalo- 

 thorax, from 5 to 6 mm. long and 4 to 5 mm. broad. The MF eyes are relatively larger 

 than MR and more widely separated than in the female. The palp is marked by a strong 

 boot shaped projection from the digital joint. (Fig. 6a.) The cephalothorax is yellowish 

 brown, strongly marked with gray hairs. The patella of the first and second pairs of legs 

 is long and thin ; the tibia of the second pair short, curved, and thickened at the end, 

 and strongly armed with two rows of about four each clasping spines, while the metatarsus 

 is also somewhat curved and armed at the base with one very long spine, and a shorter 

 one at the apex. The metatarsus-I is long, thin, and also slightly curved ; a strong bent 

 spur is on coxa-I next the trochanter. The abdomen is longer than broad, oval, of a 

 greenish or olive color (in alcohol), and marked at the base, along the sides towards the 

 apex, with long grayish brown spinous bristles. The specimen in hand appears to want 

 the corneous blisterlike plates in the middle of the apical part, as above described in the 

 female. 



DISTRIBUTION: Cambridge describes this species from Gautemala; Dr. Marx has an 

 undeveloped female from Utah, one from Texas, a mature male from Florida like the 

 above (which is from Summit Canyon, Utah), but lacking the dorsal corneous plates. The 

 female above described is from Lake Klamath, Oregon. This would indicate a wide dis- 

 tribution in the subtropical parts of the United States, and indeed of North America; and 

 that the species has found its way northward to Oregon, along the Pacific Coast, and east- 

 ward to the American Plains. (The Marx Collection.) 



1 Biologia Centrali-Americana, Araneidea, p. 27, pi. vi., 15. 



