284 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERa) 



sharply rounded apex, giving the contour of a very narrow Gothic arch. 

 Subgenital plate short, truncate distad between the short disto-lateral styles. 

 Cephalic and median limbs very slightly shorter and heavier than in versicolor y 

 with ventral margins of tibiae each likewise armed with six heavy spines 

 (slightly heavier than in versicolor). Caudal femora proportionately shorter 

 than in versicolor with proximal decidedly swollen portion similar, ventro- 

 external margins bearing 5 and 8 spines, genicular lobes of caudal femora 

 heavily bispinose, genicular areas weakly darkened. 



The measurements of the type are: length of body 13.5, 

 pronotum 3.6, tegmhia 4.9 and 5.2, caudal femur 13.4, cercus 2.3 

 and approximate width of tegmen if flattened out 3.3 mm. 



The coloration is distinctive. Head, lateral lol)es of pronotum, 

 thorax, limbs, exposed lateral portions of dorsal abdominal seg- 

 ments and cerci pale bice green. Medio-dorsal stripe of head 

 and pronotum warm sepia shading mesad on pronotum to verona 

 brown, rather l)roadly margined laterad with cinnamon buff. 

 Eyes and tegmina cinnamon, humeral trunk of tegmina cinnamon 

 bufT. Concealed proximal portion of dorsum of alxlomen tawny 

 olive paler mesad (cinnamon buff) and showing rather Inroad 

 lines of the same color meso-laterad. Exposed portion of dorsum 

 of abdomen with sixth segment weakly, and seventh and eighth 

 heavily and broadly suffused with sepia, the marg;ins of these 

 segments marked with a greenish suffusion, ninth and tenth 

 segments, subgenital plate and ventral abdominal segments 

 pinkish cinnamon contrasting strongly with the proximal dorsal 

 abdominal segments and cerci, tenth abdominal segment with 

 distal margin strongly suffused with warm sepia. Genicular 

 areas of caudal femora suffused (but not strikingly so) with 

 bistre. 



The present species is known from the imiciue type. 



Subgenus Perissacanthus *" new subgenus 

 The subgenus includes a single species from Paraguay. 

 Type of Subgenus. — Conocephalus strictoides [Xiphidinm 

 stridoides] (( 'audell) . 



Subgeneric Description. — Prostermun bispinose. Alale sub- 

 genital plate as in th(^ subgenus Xiphidion. \rn\vii\ margins of 

 cephalic; and median tibiae armed with six well spaced spines. 

 Interno-dorsal of distal spurs of caudal tibiae absent so that their 



8" From 7r6pt(To-6s = ()dd (nunibci) and clk ai>9 a =\\\orn, in allusJDn to tli(> five 

 instead of six distal si)urs of the caudal tibiae. 



