270 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 112 



lost. However, as Bonet bad stated that his wheeleri had never been 

 found outside Mexico, and as it was specifically different from Ewing's 

 wheeleri, which was found in the eastern United States, it then seemed 

 preferable to choose a specimen of Ewing's wheeleri for the neotype. 

 Therefore, in his paper on Silvestri's types of Protura, Tuxen changed 

 the name of Bonet's wheeleri to boneti, new name, and postponed the 

 redescription of wheeleri until he had examined Ewing's material. 

 In preparing the present paper we chose from this material for our 

 description a female bearing the data Mount Rogers, Virginia, eleva- 

 tion 5,000 ft., under dead chestnut bark, Sept. 19, 1938, Ewing and 

 Gurney collectors. Now that the actual holotype has been recovered, 

 we find that our redescription agrees with it (see Tuxen, 1960, p. 298). 



Some of the drawings were made from another slide containing 3 

 males, 3 females, and 2 maturi juniores labeled, under bark of logs, 

 Elk Garden Ridge, Jefferson National Forest, Virginia, Sept. 18, 1938, 

 Ewing and Gurney collectors. 



On the foretarsus (figs. 1-2), compared with the drawings of E. 

 armatum StSLch(—E. transitorium Berlese) by Tuxen (1958), the follow- 

 ing differences are noticed : The t 1 has a very characteristic thicken- 

 ing along one margin, in some cases making it appear to be a twined 

 sensilla, the disc being more or less invisible. The a, c 1, e, and g 

 are longer; d and f 2 are shorter in wheeleri than in transitorium; t 1 is 

 nearer a 3' in wheeleri, a fact especially important inasmuch as the 

 relation of the part of the foretarsus outside t 1 to the one inside t 1 

 will thus be 8:7 (=1.15), while in transitorium it is 8:8 ( = 1.00), the 

 part outside t 1 being measured to the beginning of the pretarsus. We 

 propose to denote this relation by the sign d:p (distal part: proximal 

 part), and state that d:p = 1.15 in wheeleri Silvestri and d:p=1.00 

 in transitorium Berlese. On the interior side of the foretarsus, a' is 

 shorter than in transitorium; it just reaches the tip of t 1. 



The female squama genitalis is shown in figure 3 from the dorsal 

 side. It is very different from that of transitorium. The head of 

 processus sternales is slightly rounded, rather like the squama of E. 

 mexicanum Silvestri and boneti Tuxen (1956b). 



Figures 12-22. — Eosentomon wheeleri Silvestri: 12, tarsus III; 13, mouth parts seen from 

 the ventral side, obliquely, Ga = galea, Lb = labium, Mdb = mandible; 14, mouth parts 

 seen from above. Eosentomon vermiforme Ewing: IS, foretarus, exterior side, holotype; 

 16, foretarsus, interior side, paratype. 17, female squamta genitalis, holotype; 18, tergal 

 chaetotaxy of abd. V; 19, sternal chaetotaxy of abd. V, 20, tarsus III, paratype; 21, 

 shape of head, holotype; 22, mouth parts seen from above; La 1 and La 2 = 1st and 

 2nd lacinia. 



