BIOLOGICAL PAPERS. 229 



region; eyes irregularly quadrate in outline, separated by one and one half 

 times their greatest length; antennie somewhat exceeding the body in 

 length; palpi with the third joint slightly shorter than the fifth. Pro- 

 notum arched transversely, somewhat flattened above: anterior margin 

 with the median portion slightly emarginate, posterior margin truncate, 

 inferior margin broadly rotundate. Mesonotum and mesonotum (meta- 

 notum?) posteriorly truncate, laterally extending a short distance below 

 the pronotum. Abdomen regularly armed with minute spiniform tu- 

 bercles; cerci about half the length of the posterior femur, regularly 

 tapering from the base to the apex; subgenital plate divided to the 

 base by a narrow slit, tips divergent. Anterior femora about a fifth as 

 long again as the pronotum, armed beneath on the anterior margin with 

 a single large preapical spine and several smaller ones, no genicular spine 

 present; tibite unarmed above. Median femora about equal to the an- 

 terior pair in length, armed beneath on the anterior margin with three or 

 four spines, on the posterior margin with several spines, genicular spine 

 present on one limb and absent on the other; tibiiv armed above with two 

 pairs of spines. Posterior femora short, stout, not quite three times as 

 long as broad, inferior margins with their distal two-thirds closely and 

 strongly armed with short, stout teeth, no genicular spine present; tibiae 

 slightly shorter than the femora, hardly curved, armed above with four 

 pairs of spines, below with two apical pairs and four longitudinally dis- 

 posed spines, calcaria comparatively short, the median pair considerably 

 exceeding the others in length ; metatarsi slightly longer than the fourth 

 tarsal joint, second joint very slightly longer than the third joint. 



Female. — Size medium; form moderately elongate, subequal; structure as 

 in the male, with the following exceptions : Head with the interspace be- 

 tween the eyes somewhat greater; antenna? not exceeding the body in 

 length. Cerci short, not more than one-third the length of the posterior 

 femur ; ovipositor two-thirds the length of the posterior femur, thick at 

 the base, narrow and subequal in the apical half, not curved, apex ob- 

 liquely truncate, the superior point acute and spiniform, internal valves 

 with five teeth; subgenital plate transverse, apically rounded, with a 

 slight median emargination. Anterior femora with the distinct pregenicu- 

 lar spine but no smaller ones. 



General color ochraceous, suffused above with Vandyke brown. 



Measurements : Length of body, male 22 mm., female 19 mm.; length of pro- 

 notum, male 6.5 mm., female 4.8 mm. : greatest width of pronotum, male 

 9 mm., female 6 mm. ; length of posterior femora, male 16 mm., female 9.5 

 mm. ; length of ovipositor, 6.2 mm. 



An additional smaller male from the type locality has been examined. 

 Phrixocnemis socorrensis, n. sp. 



Types: Male and female. Magdalena mountains, Socorro county, N. M.; 

 August, 1894, F, H. Snow. Allied to P. franciscanus, but differing in the 

 longer and slenderer ovipositor. 



Male. — Size large ; form rather elongate, compressed. Head broad, flattened 

 anteriorly ; interspace between the eyes not quite twice the greatest di- 

 ameter of the eye ; eye subpyriform ; antenna? slightly longer than the body ; 

 third palpal joint slightly shorter than the fifth. Pronotum arched trans- 

 versely, somewhat compressed; anterior margin slightly emarginate, pos- 

 terior truncate. Mesonotum and metanotum extending slightly below the 

 pronotum. Abdomen somewhat compressed ; cerci about half the length 



