﻿A NEW PROTURAN INSECT — GLANCE 309 



are 14/x long; setae 3 are 25m long; setae 4 are 11 /z long; setae 5 are 

 34 n long. The anterior spiracular seta is 14/x long; the posterior 9m. 

 The position of these setae approximates that given for E. ribagai 

 Berlese (1909, pi. 3, fig. 22), except that the anteriolateral setae 4 

 with the microchaetae are missing. Berlese (1909, pi. 8, fig. 80), 

 figures the tergite of the metathorax for E. transitorium Berlese on 

 which anterior setae 4 with the microchaetae are missing as also are 

 posterior setae 4. In £". germanicum Prell as figured by Prell (1913, 

 pi. 3, fig. 11), anterior setae 4 with the microchaetae are missing as 

 are posterior setae 5. Gisin's figure of E. armatum Stacli (1945, 

 fig. 1) lacks the anterior microchaetae and the postion of the anterior 

 setae is quite different; the same condition prevails in this same species 

 as figured by Tuxcn (1949, Abb, 66). I have examined the holotype 

 slides of E. rostratum Ewing (1940) and of E. pallidum Evving (1921) ; 

 the number and approximate position of the setae are the same as for 

 E. venezuelense. 



ABDOMEN 



Transverse apodemes present on tergites and sternites (fig. 86, a, 

 c-e) of abdomen I-IX, but slightly developed on abdomen I; un- 

 branched laterally. A pair of vestigial appendages ventrally on 

 abdomen I-III, conspicuous, two-segmented. 



CHAETOTAXY OF THE ABDOMEN 



Tergites and Pleurites: The tergites and the pleurites are fused 

 on all abdominal segments except abdomen IX, X, and XI. In 

 giving the arrangement and number of setae, I shall include all setae 

 present on both. The setae are arranged more or less in one or two 

 transverse rows on the most heavily chitinized portion; in all the 

 following description I refer only to this chitinized portion. The 

 rows are usually not straight, but slant posteriorly in the pleural 

 region where the setae in the anterior row are not at all in alinement. 

 Most of the setae are what I shall call primary ones, which vary greatly 

 in length but are well chitinized, and their sockets are deep and 

 heavy. In the posterior row there are also present what I shall call 

 supplementary setae; these are usually not in alinement with the 

 primaries, and are placed at the extreme posterior margin. They are 

 long, slender, and slightly chitinized, about the same length, and their 

 sockets are shallow and delicate. Also present in the posterior row 

 are occasional microchaetae. The primary and supplementary setae 

 are duplicated on the right and left sides except for an occasional 

 single one, placed exactly in the middle. In referring to the setae, 

 I shall call the median pair setae 1; then the one to the right and 

 the one to the left of them, setae 2 ; et cetera. Wherever possible, the 

 measurements have been taken from the holotype. 



