212 PROCEEDINGS OF THE ACADEMY OF [May, 



sparsely proximad, more frequently distad. Ovipositor straight, 

 robust, shorter than the caudal femora; apex acuminate, ventral 

 valves shorter than the dorsal ones. Caudal femora with ifour 

 spines on each dorsal margin: caudal metatarsus with five to six 

 spines on the dorso-external margin. 



General coloration of the head, pronotum and dorsum of the 

 abdomen ranging from mummy brown (recessive type) to blackish 

 brown — number one of Ridgway (intensive type), the limbs and 

 ventral surface buckthorn brown (recessive type) to mummy brown 

 in those having the darkest dorsal coloration (intensive) ; tegmina 

 buffy hyaline to weak fuscous hyaline, the venation of the dorsal 

 coloration. Head unicolorous with the mouth-parts washed with 

 ochraceous-tawny to amber brown; ocelli ochraceous-buff to mars 

 yellow; eyes mottled blackish-brown and dresden brown to mummy 

 brown; palpi of the same coloration as the limbs; antennae of the 

 general coloration. Wings whitish hyaline, with a brownish tinge 

 in the intensive specimens, with a distinct iridescence, longitudinal 

 veins colored similarly to those of the tegmina. Cerci of the dorsal 

 coloration. Pubescence of the limbs golden. Caudal femoral washed 

 more or less completely with the dorsal coloration. 



Measurements {in millimeters) 



Length Length Greatest Length Greatest Length Length Length 



of body of pro- width of of teg- width of of wing of caudal of ovi- 



(exclusive notuni prono- men dorsal distad of femur positor 



of ovi- turn field of tegmen 



positor) tegmen 



Igarape-assu, <2/pe 8.2 1.2 1.6 4.6 1.5 6.3 4.9 



Igarape-assu, 



paratype 7.2 1..3 1.8 4.2 1.4 5.8 5 



9 

 Igarape-assu, 



allotype 8.8 1.5 2.2 4.5 1.6 7.3 5.2 3.9 



Igarapo-assu, 



paratype 9.5 1.7 2.1 4.5 1.6 7.2 5.5 3.9 - 



Rio Pacaya, Peru, 



paratype 8.7 1.9 2.3 4.7 1.6 8.2 5.6 3.5 



In addition to the type and allotype we have examined a paratypic 

 series of seven; one male and three females bearing the same date 

 as the type (one female has no date) and three females from Rio 

 Pacaya, Peru, July, 1912, all in the collection of the Academy. 

 When examined for features of variation we find that the paratypic 

 male has five external and four internal dorsal marginal spines on 

 the caudal tibiae. The females all have four spines, excepting one 

 from Igarape-assu which has four internal on one limb and five on 

 the other. The spines on the dorsal margin of the caudal metatarsus 



