1904.] NATURAL SCIENCES OF PHILADELPHIA. 779 



variation in the size of the adults of both sexes, but coloration appears 

 to be quite uniform', such difference as is apparent being due to the 

 extension of the abdomen, which causes the insect to appear more of a 

 chestnut color than is the case when in normal position. The speci- 

 mens were all taken in the months of December and March. 



This species is seldom to be met with, but when found is almost in- 

 variably in very large numbers. In 1903 a few specimens were taken 

 in the woods about Thomasville, and one colony of over forty specimens 

 was discovered in Leon County in a dead pine log under the loose 

 bark. In 1904 but one colony was observed; this was in the trunk 

 of a large magnolia which, though long dead, was still standing. The 

 specimens were all taken from the trunk less than five feet above the 

 ground where the wood was soft, damp and pulpy and the bark loose. 

 By visiting this tree several times and picking off all the loose bark and 

 soft wood over one hundred and fifty specimens were obtained, the 

 specimens usually found singly. This was the same tree on which 

 Spongophora hrunneipennis was found. Quite a number of immature 

 specimens of S. hrunneipennis were taken among individuals of this 

 species. (M. H.) 



Family BLATTID^. 



Ischnoptera inaequalis Saussure anJ Zehntner. 



Immature specimens of what appears to be this species were taken 

 at Thomasville, on March 23 and April 9, 1904. The individuals taken 

 on the latter date were from Linton's Pond, a body of water several 

 miles southeast of Thomasville. All were on oak. A single adult 

 male was taken at Thomasville, on May 6, 1903, and this appears to 

 be unquestionably incequalis. Blatchley has recently recorded this 

 species from Indiana, and with the original localities — North Mexico 

 and Texas — and Costa Rica, we have some idea of the distribution of 

 the species. The immature Thomasville specimens are in such condi- 

 tion that the identification is attended by a little uncertainty, but no 

 other known North American species agrees with them as fully as 

 inaequalis. 



All the immature specimens taken were found under advertising 

 signs on white oak trees only, and were extremely rapid in their move- 

 ments. (M. H.) 



Isclinoptera jolmsoni Rehn. 



This species is represented in the Thomasville collections examined 

 by an adult male taken July 23, 1903, and a series o' immature indi- 

 viduals taken December 1, 1903, March 1, 23 and 25, and April 9, 

 1904. The immature specimens were all taken under sign, on trees 



