54 NEOTROPICAL PSELAPHIDAE 



I take pleasure in naming this distinct species for my young friend, Donald 

 Chickering, with whom I spent many happy hours in the Central American 

 forest. This species belongs to Group IV, and can be readily separated from 

 terranus on many characters, e.g. the posterior tronchanters are not spined, 

 metastemum not carinate medianly, entirely different pronotal outline, shorter 

 pubescence and much smaller size. 



Jubus turneri new species 



Total length 0.8 mm. Greatest width 0.29 mm. (PI. VII.) 



Unless stated otherwise, the following details are drawn from the holotype 

 male ; certain details were obtained from slide mounts of male paratypes, where 

 magnifications of from 500 to 1000 diameters could be used. Such magnifications 

 are indicated. 



Color light yellowish-brown, with the antennae, maxillary palpi and legs 

 paler. Body pubescence yellowish-cream, short, appressed. Average length of 

 body pubescence 0.02 to 0.035 mm. 



Head rounded-triangular, eyes medium large, prominently semicircular 

 from the dorsal view, composed of about 30 moderately coarse facets. Occiput 

 is broadly sinuate but not medianly notched. Temporal angles rounded and 

 prominent, their length equal to the longitudinal diameter of the eye from a 

 dorsal view. Vertex evenly convex, conspicuously elevated above the eyes. Ver- 

 texal foveae minute, nude, of same diameter as the associated sulci, and placed 

 on a line passing through the middle of the eyes ; vertexal sulci straight in their 

 basal half, then medianly arcuate to form a common sulcus; this common sulcus 

 extends medianly between the antennal prominences, to medianly notch the 

 abruptly vertical front between the antennae. Antennae eleven-segmented ; close 

 together at insertions, narrowing the front in the typical genus pattern ; segment 

 I and II large, equal in width ; I quadrate ; II oval ; III and IV subequal in length 

 and width, subspherical ; V to VII narrower than II; V to VII progressively 

 wider, V transversely ovate, VI transversely ovate and subrhomboidal, VII 

 transversely rhomboidal; VII not as wide as VIII; VIII, IX, X and XI forming 

 a club, these segments progressively slightly wider, the club distinct from a 

 dorsal view and indistinct from a lateral view; XI slightly longer than VIII, 

 IX and X united, narrowly truncate at base, broadest at basal third then length- 

 ily narrowing to subacute apex. 



Maxillary palpi out of the ordinary for the genus, the following taken from 

 slide mounts of four male paratypes. Four-segmented. First segment unusually 

 large, 0.013 mm. long, cylindrical, slightly wider at apex, sharply angulated at 

 middle so that the segment is bent nearly to a right angle. Second segment 0.018 

 mm. long by 0.018 mm. wide, strongly triangular, and very little longer than 

 large first segment. Third segment 0.018 mm. long by 0.018 mm. wide, pyra- 

 midal, with the narrow face basal, and the broad face apical. Fourth segment 

 0.054 mm. long by 0.027 mm. wide, significantly larger than other segments, 

 pedunculate-securiform, broadest medianly, tapering rapidly to base and slowly 



