344 STUDIES IN THE ISCHNOPTERITES (oRTHOPTERA) 



Description of Type.— Size large for genus; form slender, nearly as slender as 

 in vulpina. Head with interocular space very narrow, its width about one 

 quarter of a millimeter, but two-fifths as wide as interocellar space which is 

 narrower than in vulpina. Ocelli and maxillary palpi as in that species. 

 Pronotum broader, approximately as broad in proportion as in /. mono, with 

 discal sulci very weakly indicated. Tegmina and wings elongate, though not 

 as decidedly so as in niorio or vulpina. Supra-anal plate as in vulpina. Pub- 

 genital plate of similar structure (.^ee description of vulpina). but with produced 

 portion less extensive and in position situated slightly more sinistrad of mesal 

 point; free margin dextrad strongly convex then very weakly concave; sinistral 

 style very small, less than half as long as large dextral style and separated 

 from it by only its own length, thus the styles are more nearly adjacent than 

 in vulpina as the sinistral style is smaller in the present species. 



Measurements (in millimeters) 



5^ -5 a J3C ■S.B ^c 



Mo Mg .Sg MM _^M 



Rio Pacaya, Feru, type 15.2 4 5.2 17.7 4.2 



Coloration. — Head to ventral margins of ocelli shining blackish 

 brown, there shading to cinnamon rufous with maxillary palpi 

 buffy. Pronotum ochraceous tawny, very faintly paler laterad 

 and cephalad. Tegmina translucent tawny, the marginal field 

 ochraceous buff. Limbs and underparts warm buff, the abdo- 

 men shading to ochraceous tawny distad. 



The type is unique. 



Ischnoptera vulpina new species (Plate XVI, fig. 8; pi. XVII, fig. 6.) 



Near relationship to I. rufa rufa is shown by this species and 

 to /. angustifrons, under which latter insect full comparisons are 

 made. 



T'ype.— cT', Caparo, Trinidad. August, 1913. (S. M. Klages.) 

 [Hebard Collection, Type no. 422.] 



Description of Type. — Size large for genus; form slender, more slender than 

 in I. morio. Head with interocular space slightly narrower than interocellar 

 space, both dimensions proportionately appreciably less than in rufa rufa. 

 Ocelli conspicuous, with flat surfaces of ocellar areas .slanting st.ongly me-ad. 

 Maxillary palpi more elongate than in rufa rufa. Pronotum less transverse 

 than in morio, with discal sulci decided as in that species. Tegmina and 

 wings much as in morio, j:roportionately det-itledly more elongate than in ii/fa 

 rufa, but, as in the latter species, with portion of doxtral tegmen, concealed 

 when at rest, not as strikingly transparent. Dor.sal abdominal hCgmenta 

 specialized as given in generic description; all of sixth segment, except the 

 sm.all elevated lateral fortions', more delicate than in mono, entirely 

 weakly chitinous. Supra-anal plate much as in rufii rufa, l)ut even more 



