EWING'S PROTURAN SPECIES — BONET AND TUXEN 287 



Acerentomon conurus Ewing 



Acerentomon conurus Ewing, 1921b, p. 197. — Ewing, 1940, p. 541. 



There are several slides determined by Ewing as conurus, among 

 them the holotype, with the label, Takoma Park, Maryland, 

 in decaying leaves and twigs, April 10, 1921, H. E. Ewing collector. 

 The holotype specimen lies on this slide in such a way that the fore- 

 tarsus appears to be very greatly shortened. The mutual size and 

 placement of the sensillae therefore look different from those of 

 Acerentulus americanus. It would be misleading to print the drawing 

 of this foretarsus, as in fact there is no difference between the fore- 

 tarsus of the other specimens of conurus and americanus. They are 

 alike in every feature. 



The chaetotaxy, the comb of abd. VIII, the shape of the head, and 

 the filamento di sostegno are also the same in every respect as they are 

 in americanus. A small difference might be found in the placement of 

 the. two small setae anteriorly and posteriorly to the pseudoculus. In 

 americanus the distance of the two setae from the pseudoculus is the 

 same ; in conurus the postocular seta is nearer to the pseudoculus than 

 the preocular one. We should not like to make this difference, which 

 might even be subject to individual variation, a specific character, 

 however, and so we feel justified in stating that Acerentomon conurus 

 Ewing is a synonym of Acerentulus americanus (Ewing), the latter 

 name having priority. 



Acerentomon andrei Ewing 



Figures 55-65 

 Acerentomon andrei Ewing, 1940, p. 537. 



The holotype female is the only specimen present, with the label, 

 Utah, Salt Lake, dead leaves, Aug. 3, 1937, F. Andre collector. 



On the foretarus (figs. 55-56), t 1 has a curious shape, clavate but 

 pointed; d:p = 99:34(=3.0); t 3 is long, lancetlike. All sensillae are 

 long, including probably also d, which is broken; b and c are of the 

 samel ength; f is much longer than g; f reaches halfway out on the claw. 

 The a', b', and c' are also very long. The empodium is short; e:u = 

 10:45(=0.2). 



The chaetotaxy (figs. 57-62) schematically is as follows: 



