92 PROC. ENT. SOC. WASH., VOL. 22, NO. 5, MAY, 1920 



Nymph . 



Of this stage specimens of three or four periods of development 

 have been examined. Several specimens in the stage apparently 

 immediately preceding complete maturity, corresponding to those 

 noted under hubbardi in having well developed and mobile wing- 

 pads, occurred. 



Specimens in this stage of development can be readily distinguished from 

 the corresponding form of hubbardi, as the diagnostic characters of the alated 

 adult are present here also, and in addition the eyes only are distinctly- 

 present subcutaneously, the ocelli not being indicated; there may, however 

 be variations found to exist here when more material is examined. But in 

 the earlier stages of this form, where the wing-pads are not well developed 

 the diagnostic characters so readily separating the more advanced nymphs 

 and the adults from hubbardi are progressively less well marked. In the 

 smaller of the two or three stages noted the characters are closer to those 

 of hubbardi, the bristles and spines of the legs being less specifically different 

 and the structure of the antennae varying to the form found in hubbardi. 

 The second and third segments of the antennae of the smallest specimen area, 

 are sub-equal and both decidedly smaller than the others. But the spines of 

 the body are black and very decidedly more conspicuous than in hubbardi, 

 especially when seen against a white background, and the terminal bristle 

 of the cercus is fully twice as long at the cercus itself, characters serving to 

 identify with considerable assurance even the smallest specimens of this stage. 

 The eyes are not, or barely, visible in smaller specimens, growing more dis- 

 tinct as the insects approach maturity. 



Length l 3 / 4 -2V4 mm. Wing-pads of largest specimens about l / z mm. 



Four specimens with fully developed wing-pads and half a 

 dozen younger specimens, all from Miami, Fla., collected by Sny- 

 der. 



The specimens with fully developed movable wing-pads are ap- 

 parently quite different from the smaller, less developed ones 

 without movable wing-pads. They may, indeed be brachypterous 

 adults, as considered by Snyder as set forth under the correspond- 

 ing phase of hubbardi. 



Apterous Chitinized Adults. (Fig. f>.i 



Female. This form, not represented, so far as now known, in hubbardi. 

 superficially resembles dealated specimens of the winged form. The head 

 is, however, without either eye or ocelli, the place where the eyes would be 

 located being marked only by a few obscure bristles. The antennae are a> 

 described in the winged adult, as are also the posterior femora, though here 

 more of the inner ventral spines are stout. There is some variation appar- 

 ent in the exact number of these spines, but usually there are about si-vi-n or 

 eight. Otherwise this apterous adult form is essentially like the winged form 

 described above. 



