58 PROCEEDINGS OF THE ACADEMY OF [Jan.. 



slightly longer than broad; eighth segment equal to the seventh in 

 length, compressed, lateral portions produced inferiorly, the margins 

 roimded except the posterior angle which is slightly acuminate; ninth 

 dorsal segment very slightly longer than broad, somewhat bullate. 

 apical margin truncate with a very broad shallow median emargination ; 

 cerci rather small, slightly clavate, curved ; subgenital opercule not quite 

 equalling the apex of the eighth dorsal segment, large, compressed, tec- 

 tate, apical portion with a longitudinal keel which develops a blunt 

 point below and slightly posterior to the superior margin. limbs 

 very slender and elongate, carinate, unarmed. Anterior femora equal 

 to the head, pronotum and meson otum in length; tibise exceeding the 

 femora by the length of the head and pronotum; metatarsi slight!}- 

 exceeding the remaining tarsal joints in length. Median femora equal to 

 the mesonotum in length ; tibia exceeding the femora by the length of 

 the pronotum; metatarsi equal to the remaining tarsal joints in length. 

 Posterior femora reaching to the apex of the fourth abdominal segment : 

 tibiae exceeding the femora by about half the length of the first 

 abdominal segment ; metatarsi slightly exceeding the remaining tarsal 

 joints in length. 



General color brownish-olive, dark in the genicular regions and pale 

 on the head, pronotum, apex of the abdomen and proximal portions of 



the femora. 



Measurements. 



Total length, 107^ mm. 



Length of pronotum 3.7 



Length of mesonotum, ,27 



Length of metanotum (with median segment), .... 20 " 



Length of abdomen, 56 " 



Length of anterior femora 34.5 " 



Length of anterior tibiae, 42 " 



Length of median femora, 28 " 



Length of posterior femora, 33.5 " 



Two additional specimens of this species have been examined, one 

 a topotype, the other from Piedras Negras, Costa Pica. They agree 

 perfectly with the type in structure and coloration. 

 Bostra remiformis n. sp. 



Type. — 2 ; Piedras Negras, Costa Rica. (Schild and Burgdorf.) 

 [Cat. No. 6,978, U. S. N. M.] 



Apparently not allied to the only species of the genus, B. turgida 

 Westwood, known from the female. It does not appear to be the 

 female of any of the species based on the opposite sex. From the female 

 of B. turgida it differs in the non-spinous body, the triangularly emar- 



