96 PROCEEDINGS OF THE ACADEMY OF [Mai'ch^ 



length; caudal tibiae slightly shorter than the femora, external 

 margins armed with five spines, of which the distal three are grouped 

 separate from the others, internal margins with ten to eleven spines; 

 caudal tarsi with the second joint slightly more than half the length 

 of the first, third slightly longer than the first. 



General color very dull olive-green, slightly yellowish on the 

 head. Antennae and fastigium blackish, the distal fifth of the antennae 

 cadmium-yellow; eyes raw umber. Abdomen Chinese orange dorsad 

 and laterad, the ventral and lateral portions of the inter-segmental 

 margins of the dorsal sclerites broadly blackish, leaving the orange 

 as semicircular blotches visible ventrad of the closed tegmina. 

 Cephalic and median limbs washed with very dull purplish. Internal 

 and ventral faces of the caudal femora very deep maroon-purple, 

 internal face of the genicular region of the caudal femora and tibiae 

 black, external face of the same area of the former with an apical 

 and median spot on the lobes as well as the arches and dorsal portion 

 of the same region cadmium-yellow; caudal tibiae dirty purplish- 

 brown, the spines black. 



Measurements. 



Length of body 42 . 5 mm. 



Length of pronotum 7 



Length of tegmen .s 36 .5 



Length of caudal femur 19 



The type is unique. 



ZYGOCLISTRON Rehn. 

 Zygoclistron acutum u sp. 



Type: 9 ; Petropolis, State of Rio de Janeiro, Brazil. [Hebard 

 Collection.] 



Closely related to Z. superbwn Rehn, but differing in the more 

 acute fastigium, the less expanded and much more shallowly sulcate 

 frontal costa, the more bullate prozona of the pronotum with the 

 median carina of that portion weak, and in the caudal width of the 

 interspace between the metasternal lobes being equal to the narrowest 

 portion of the interspace between the mesosternal lobes, instead 

 of distinctly wider as in superbum. 



Size large, form moderately robust. Head with the occiput con- 

 siderably arcuate, but little elevated, descending slightly to the 

 interocular region which is slightly more than two-thirds the width of 



