MORGAN HEBARD 77 



Wings with costal field and all veins rather dark chestnut brown, all remaining 

 portions of wing except proximal two-thirds of anterior field strongly tinged with 

 chestnut brown. Dorsal surface of abdomen shining, rather dark chestnut brown. 

 Cerci chestnut brown. Ventral surface of abdomen chestnut brown, slightly paler 

 meso-proximad. Limbs bufi"y, except proximal portions of coxae which are suffused 

 with chestnut brown, spines, tawny. 



Length of body, 10.2; length of pronotum, 2.8; width of pronotum, 3.3; length of 

 tegmen, 11 ; width of tegmen, 2.9; length of cercus, 2; length of caudal femur, 4; 

 length of caudal metatarsus, 2; length of succeeding caudal tarsal joints, 1.9 milli- 

 meters. 



The type of this remarkable species is unique. 

 Ischnoptera panamae new species (Plate IV, figures 14 and 15.) 



This species in general appearance resembles /, tolteca Saussure.^"^ 

 The description of /. 7iana Saussure and Zehntner would indicate 

 nearest relationship to that species, but so insufficient is it that 

 nothing definite as to the real degree of affinity can be ascertained. 

 From that description, it appears that the present insect differs from 

 nana in having the latero-caudal sulci of the pronotal disk distinct, 

 not obsolete, while the styles of the male subgenital plate can hardly 

 be termed normal. '^"'^ In every case where males have been available 

 for comparison, the genitalia for each species of the second section 

 of the genus Ischnoptera have been found not only highly specialized 

 but very distinctive. 



Type. — cf ; Empire, Canal Zone, Panama. November 14, 191 3. 

 (]\I, Hebard.) [Hebard Collection, Type no. 488.] 



Size small, form moderately slender, much as in /. mirella here described. Inter- 

 ocular space moderately broad, slightly narrower than that between the ocelli, 

 hardly three-fifths that between the antennal sockets. Ocelli large and distinct, 

 flattened surface of ocellar areas forming a blunter angle with the interocellar area 

 than in mirella. Maxillary palpi short, fifth (distal) and third joints subequal in 

 length, distinctly longer than fourth. Latero-caudal sulci of pronotal disk moder- 

 ately decided.'"'' Tegmina and wings extending a short distance beyond apices of 



'"^ The unstudied collections at hand contain a number of species which, though in 

 general appearance closely resembling tolteca, show remarkable male genitalic features 

 of specific diagnostic value. 



'"* From the measurements given for nana, the present species differs in the shorter 

 pronotum and the more elongate tegmina. We regret that we do not, however, feel 

 the confidence in the accuracy of the measurements given in this portion of the Biologia 

 Centrali-Amcricana, probably taken by Zehntner, necessary to make ihem of any great 

 value for close comparisons. 



'"^ In some individuals ot the scries more strongly indicated than in others. 



MEM. AM. ENT. SOC, 4. 



