PROC. EKT. SOC. WASH., VOL. 22, XO. 5, MAY, 1920 87 



any definite point hut, so far as observed, always occurs at some point 

 basad of the commencement of the veins, which is, as shown in Fig. 1, a 

 short distance from the base of the wing. The wing stubs of dealated 

 specimens appear like two paired projections, the membrane between the 

 costal and anal marginal stubs being visible only on close examination, as 

 it splits and folds closely to the stubs. 



The abdomen is elongate, mesially broadened and has eight distinct chitin- 

 ized dorsal segments, the first four shorter than the others, the basal ones 

 sometimes not very distinct. The eighth segment is broadly rounded pos- 

 teriorly; beyond this eighth dorsal segment is a broad, apically rounded, 

 partially chitinized, moderately declivate plate; these features are discussed 

 and figured by Dr. Crampton in the paper immediately following this. In 

 his paper Dr. Crampton indicates that there are 9 ventral segments, including 

 the Hypogynium or 8th ventral segment, and the Hypoproct or sub-anal 

 plate; but as I make them out, there seems to be only 8 visible segments and 

 the basal one of these is not always easily observed. 



Length, to tip of abdomen, 2 mm., anterior wings, o mm. 



Eighteen specimens, o winged and 15 dealated, from the fol- 

 lowing localities: Buffalo Bayou, 18 miles below Houston, Tex., 

 October 1C), 1U1S, Barber, 3 winged, 4 dealated. 



Near Wallisville, Chambers County, Tex., near, but not in, 

 occupied galleries of Termites, November 5, 1!>1S, Barber, 9 

 dealated. 



Miami Beach, Fla., under bark of red mangrove near base 

 where it was damp, with Prorhinotermes simplex, T. E. Snyder, 1 

 dealated. 



Naranja, Fla., March 1, 1 <)!'., Alex. Wetmore, 1 dealated. 



Nymph of Winged Form. (Fig. 3.) 



The only specimens of this form examined arc apparently in 

 the last stage prior to the change to maturity. 



This form has well developed wing-pads, and the general appearance is 

 well shown by Fig. 3. The thoracic structure differs materially from that 

 of the adult, also better appreciated from the figures than by description ; 

 the eyes and ocelli are present and distinct, but are situated subcutaneously, 

 as shown by careful examination of alcoholic material but not brought out 

 in the figure ; in dry material the covering cuticle is more opaque, making the 

 organs of sight much more obscure, the ocelli in fact being almost or quite 

 invisible in such specimens. 



The antennae are essentially as in the adult but the posterior femora are 

 without strong chitinized spines below, in this particular agreeing with the 

 corresponding stage of the apterous form. The nymphs in this stage of 

 development, that apparently preceding maturity, are very slightly chitinized 

 and the dorsal hairs and bristles of the body and legs are pale and obscure. 



