QO PROC. ENT. SOC. WASH., VOL. 22, NO. 5, MAY, IQ2O 



Liberty, Tex., Nov. 20, 1918, Barber; Buffalo Bayou, eight miles 

 below Houston, Tex., Oct. 20, 1918, Barber. 



The Larva of Winged and Apterous Forms. 



Immature stages of the wingless Zorotypus were not represented 

 in the material forming the basis of the former paper, the two on 

 a slide recorded as probably being male nymphs being really 

 adult females. But in the material studied in the preparation 

 of this present paper there are a goodly number of larvae. 



In general appearance these resemble quite closely the eyeless and apterous 

 unchitinized adult described above ; the antennae, however, differ decidedly 

 from those of adults and nymphs in having only eight segments instead of 

 nine, and generally the second segment alone is decidedly smaller than the 

 others, instead of both second and third being small; the terminal five seg- 

 ments of the antennae of the larva also tend to be noticeably less elongate 

 than in the more matured insect, this feature is more obvious in the younger 

 specimens examined. There is some variation in the relative size of the seg- 

 ments of the antennae; thus the third segment is usually noticeably smaller 

 than the fourth but often it is not, or barely, so. The reduction of the num- 

 ber of antennal segments in the young from nine to eight is probably brought 

 about by the union of the third and fourth segments, as is indicated by a 

 very obscure indication of an illy defined transverse sub-basal sulcation of 

 this larger segment, faintly visible in one or two of the several specimens 

 examined. The larvae are also differentiated by the smaller size and by 

 the absence of chitinized spines on the ventral margin of the posterior femora. 

 A few apparently mature individuals lack such spines, but, as stated above, 

 these are very likely freshly matured individuals. The hairs and bristles of 

 the body are pale and obscure. There are about three sizes of larvae, the 

 smallest measuring about 1 mm. in total length, the largest almost twice as 

 much. There are no characters, so far found, to separate the larvae of 

 the winged and apterous forms. Thus the above notes apply to both. 



Many specimens from : Naranja, Fla., Feb. 24, 1919, Barber; 

 id, Mar. i, 1919, Wetmore; Princeton, Fla., Feb., 24, 1919, 

 Snyder; Ortega, near Jacksonville, Fla., Mar. lo, 1919, Snyder; 

 near Wallaceville, Chambers Co., Tex., Nov. 5, 1918, Barber; 

 Buffalo Bayou, eight miles below Houston, Tex., Oct. 20, 191 S, 

 Barber. 



Zorotypus Snyderi, n. sp. (Fig. 5.) 



All of the material of this apparently undescribed species was 

 taken by Mr. T. E. Snyder, in whose honor the insect is named, 

 at Miami Beach, Fla., all on April 29, 1918, except one apterous, 

 pigmented male on Feb. 28, 1919. In 1918 pieces of a red man- 

 grove log containing colonies of a white ant, Prorhinotermes sim- 

 plex Hagen, were brought to the Field Station of the Bureau of 



