Zool.— Vol. 1.] BANKS— MEXICAN ARACHNWA. 247 



135. Tetragnatha fraterna, sp. nov. 



Plate XV, Fig. ii. 



Length <5 9.5 mm. long; femur I 8.5 mm. long. Mandibles about as long 

 as the cephalothorax, yellowish, a small tooth between the large one above 

 and the margin, fang long and wavy; tibia of palpus a little longer than patella. 

 Length 9 10 mm.; femur I 8 mm. long; abdomen 2 mm. wide. Cephalo- 

 thorax yellowish, with blackish marks; abdomen with a folium above, and a 

 black median stripe below. Mandibles less than two-thirds as long as cepha- 

 lothorax; fang short, evenly curved, scarce a trace of a tooth on outside at 

 base. Abdomen nearly cylindrical, rather larger at base. Eyes of posterior 

 row at equal distances; A. S. E. very much smaller than P. S. E., which they 

 touch. Two 2 with a large abdomen at base are closely related, but are 

 perhaps different. 



One male and several females; San Jose del Cabo. It 

 has shorter mandibles than T. grallator, a more slender 

 body, and the ? fang not curved. 



136. Tetragnatha convexa, sp. nov. 



Plate XV, Fig. 10. 



Length £ 10 mm. ; femur I 12 mm. Mandibles almost as long as the cepha- 

 lothorax, yellowish, apical half convex on outer side, no tooth between large 

 one above and the inner margin; tibia of palpus once and a half as long as 

 patella. Length $ 13 mm.; femur I 11 mm. long. Cephalothorax yellowish, 

 with some faint dark marks; abdomen with a distinct folium above, a narrow 

 silvery stripe each side on venter; sternum dark. Mandibles three-fourths 

 as long as cephalothorax, much more convex (seen from the side) than usual, 

 a prominent tooth on outer side of fang at base, and a large black one over 

 the base of fang. Abdomen 3. 1 mm. broad, enlarged at base. The A. S. E. 

 hardly smaller than the P. S. E. ; the P. M. E. rather closer to each other 

 than to the P. S. E. 



Several specimens; San Jose del Cabo. 



137. Tetragnatha intermedia, sp. nov. 



Plate XV, Fig. 14. 



Length £ 8.5 mm.; femur I S.5 mm. long. Mandibles four-fifths as long as 

 the cephalothorax, yellowish, fang long, rather wavy; tibia of palpus short, 

 but little longer than patella. Cephalothorax yellowish, marked with blackish ; 

 sternum yellowish; abdomen dark, cylindrical. Eyes of posterior row about 

 equally distant; A. S. E. smaller than P. S. E. 



