JAMES A. G. KEHN 
119 
Gryllotalpa intermedia Saussure 
1874. Gryllotalpa intermedia Saussure, Miss. Sci. iMcxiq., Rech. Zool., vi, pp. 
341, 345. [Hot lands of the Gulf Coast of Mexico; Central America.] 
^Manaos, Amazonas. (Mann and Baker.) One male. 
Concha Huaya, Rio Ucayali, Peru. January 7 to 10, 1913. 
Two females. 
Contamano, Rio Ucayali, Pern. October to December, 1912. 
Five males, seven females. 
Rio Pacaya, Peru. Jul}’’, 1912. Seven males, five females. 
The series referred to intermedia fully agrees with the brief 
original description and the line or so of additional information 
given later by the original author. We have been able to study 
a single male of this species from Port Limon, Costa Rica, from 
the collection of the United States National IMuseuni (Fred. 
Knab), and, aside from the features here mentioned, the Amazon- 
ian series agrees with the Costa Rican specimen. The latter is 
smaller than the majority of the Brazilian or Peruvian material, 
being very close to the original measurements, while the wings 
are briefly caudate, just reaching to the base of the disto-dorsal 
abdominal segment. All the present South American series are 
elongate caudate in wing development, these much surpassing the 
apex of the abdomen, while the ocelli are much smaller, propor- 
tionately as well as relatively, in the Port Limon individual than 
in the others. The wing length features are clearly as ndividual 
in this species as the same conditions are in G. hexadactijla and 
other species of this subfamily, while the ocellar size difference is 
probably geographic or has a physiologic correlation, similar 
variation being known in hexadactijla. The specimens before 
us show that the development of the double series of chaetiform 
hairs on the disto-dorsal abdominal segments is correlated, as 
mentioned above under hexadactijla, with the wing length. The 
relatively short-winged Port Limon specimen has these sub- 
obsolete, while the remaining long-winged individuals have them 
distinctly developed. 
The species is distinctly smaller and more slender than hexadac- 
tiyla, with shorter digits on the cephalic tibiae. The form shows 
considerable individual size variation, which is not sex correlated, 
although the very smallest ndividuals seen are males. However, 
some of the largest specimens are also males, while certain females 
TRANS. AM. ENT. SOC., XLIII. 
