PROC. ENT. SOC. WASH., VOL. 22, \O. 5, MAY, 1920 85 



1. The fully winged chitinized adults with well developed eyes and ocelli, 

 most specimens studied having lost the wings by shedding them in a manner 

 similar to that in Termites. 



2. A very slightly or barely chitinized nymph' with nine segmented anten- 

 nae, similar to those of the adult, with eyes and ocelli situated subcutaneously 

 and with wing-pads more or less developed. 



3. Unchitinized apterous larvae without external eyes or ocelli, and possess- 

 ing antennae with but eight segments, though otherwise similar to those of 

 the adult. 



4. A wingless, unchitinized form, without eyes or ocelli, and with 9-seg- 

 mented antennae, the form described in my former paper as adults, and which 

 they very surely are. In this case some of them certainly are nymphs cor- 

 responding to form 2 of the winged phase as above enumerated. But it 

 appears impossible to differentiate them, as they agree in all diagnostic 

 character with the more mature adult form. The apterous, unchitinized 

 larva of this type is also apparently inseparable from those of the winged 

 phases. 



In /. snyderi, the new species herein characterized, we have 

 the same forms as in hubbardi and in addition there is an apterous 

 form, fully chitinized and superficially resembling the dealated 

 chitinized adult of /. hubbardi, but differing in having neither 

 eyes nor ocelli. The larvae and nymph are as in 7.. hubbard-i, the 

 9-segmented antennae of the latter indicating its stage of develop- 

 ment. For the present, descriptive notes on these various types 

 of the two species is all that can be given, leaving the future to 

 reveal the biological relationships of the various forms. 



Z. hubbardi Caudell. In addition to the ten specimens in the 

 lot discussed in the former paper, a total of over one hundred 

 specimens has been examined in the preparation of the present 

 treatment of '/.. hubbardi. The material represents collections from 

 three localities in Texas and four in Florida. In Texas Mr. Bar- 

 ber took three fully winged and five dealated aclult females, three 

 nymphs of the alated form, thirty-five unchitinized apterous ad- 

 ults and seven larva and nymphs under the bark of a liquidambar 

 log near Jackson's Landing on Buffalo Bayou, about eight miles 

 below Houston ; this was the first discovery of the winged form and 



The term nymph is usually applied indiscriminately to the various stages 

 of insects with incomplete metamorphosis, from the first stage after leaving 

 the egg to that preceding maturity. But a separate term is sometimes needed 

 to design-ale that stage of ;i winged insect's development when wing-pads 

 first appear. This is especially desirable in the case of Zorotypus, where it 

 is apparently in this stage of development that the antennae become nine- 

 segmented, and the wing-pads appear. The term nymph, therefore, is used 

 in the present paper for the immature stages succeeding the molt at which 

 wing-pads appear, larvae being used for the sta^e- preceding that molt. 



