380 STUDIES IN THE ISCHNOPTERITES (oRTHOPTERA) 



EXPLANATION OF PLATES 



Plate XVI 



Figures greatly enlarged. 



Fig. 1. — Ischnoptera atrata new species. cj',type. Caparo, Trinidad. Dorsal 

 view of supra-anal plate." 



Fig. 2. — Ischnoptera atraia new species, c?, type. Ventral view of subgenital 

 plate. 



Fig. 3. — Ischnoptera ruf a ruf a (DeGeer). d'. Arecibo, Porto Rico. Dorsal 

 view of supra-anal plate and preceding segments.''^ A. Char- 

 acteristic specialization of the sixth and seventh dorsal abdominal 

 segments in males of Ischnoptera. 



Fig. 4. — Ischnoptera ruf a rufa (DeGeer). cf. Arecibo, Porto Rico. Ven- 

 tral view of subgenital plate. 



Fig. 5. — Ischnoptera rufa debilis new subspecies, c?, type. Santa Maria de 

 Dota, Costa Rica. Dorsal view of supra-anal plate'^ and preceding 

 segments. 



Fig. 6. — Ischnoptera rufa debilis new subspecies, cf , type. Ventral view of 

 subgenital plate. 



Fig. 7. — Ischnoptera rufa occidentalis Saussure. cf. Vera Cruz, Mexico. 

 Ventral view of subgenital plate. 



Fig. 8. — Ischnoptera vulpina new species, d', type. Caparo, Trinidad. 

 Dorsal view of supra-anal plate. 



Plate XVII 



Full figures and wing, three times natural size. Other figures greatly en- 

 larged, except dorsal secondary sexual process which is highly magnified. 



Fig. 1. — Ischnoptera morio Burmeister. <d . Caracas, Venezuela. Cephalic 



view of cephalic femur.^'* 



Fig. 2. — Ischnoptera morio Burmeister. cf ■ Caracas, Venezuela. Diagram 



of wing.'^ 



" In figures 1, 3, 5 and 8 of this plate, and figure 4 of Plate XVII, the areas 

 of the supra-anal plates figured, which are occupied by a soft or subchitinous 

 integument, are indicated by faint irregular lines. 



" The specialization of the sixth and seventh dorsal abdominal segments is of 

 the same character throughout the genus Ischnoptera, showing no specific 

 diagnostic differences. 



" The outline and extent of the subchitinous area of the male supra-anal 

 plate shows considerable individual variation in the races of /. rufa and, in 

 consequence, this feature is not of as great importance as might otherwise be 

 inferred from consideration of figures 3 and 5. 



'■• Characteristic for the genus Ischnoptera. 



'* Characteristic for the genus Ischnoptera. 



