560 



CAROLINE B. THOMPSON 



the worker until after staining, when small rudimentary com- 

 pound eyes may be distinguished. No ocelli are present. 



2. The soldiers. Soldiers are found in the colony throughout 

 the year. The entire body measures 6 to 7 mm. in length, but 

 the head is much longer and the abdomen shorter than that of 

 the worker. No eyes can be seen until after the head is stained, 

 when rudimentary compound eyes even smaller than those of the 

 worker become visible. The opening of the frontal gland is in 

 the median line of the frontal surface of the head. 



Fig. 1 The abdomens of three individuals seen from the ventral surface. 

 A, adult male; B, adult female; C, female nymph with long wing pads; 2 to 10, 

 2nd to 10th abdominal segments. Obj. 32, oc. 6, reduced one-half. 



III. Means of distinguishing the sexes 



The only differentiation between the two sexes in any caste 

 of L. fiavipes is in the size of the abdomen, and in the relative 

 size and arrangement of the sternites, i.e. the ventral parts, of 

 the posterior abdominal segments. 



The sex of any termite may be distinguished by the size and 

 the shape of the seventh and eighth abdominal sternites.^ 



In the male viewed from the ventral surface (fig. 1, ^) the 

 seventh and eighth abdominal segments measure about the same 

 in length, i.e., in an antero-posterior direction, and the seventh 



' The ventral surface of the first abdominal segment is entirely covered by the 

 metathorax, so that the actual seventh segment is apparently the si.xth. 



