JUBININI 57 



Metasternum very much shorter than that of the male, 0.09 mm. long, 

 about as long as the first stemite between the posterior coxae. The metasternum 

 is carinated longitudinally and medianly, however, as in the male. 



Tergites with the first long, one-half longer than the second, but not so long 

 as in the male. 



Sternites differing. First as in the male; second long, two-sevenths longer 

 than third, with a median transverse fossa at base. However, the fossa in the 

 female is less deep and slide-mounts show no carinate edges, although the 

 whorled ante-fossal foveae are well-developed. Third longer than fourth ; fourth 

 longer than fifth ; sixth also longer than fifth. 



Comparison of the two sexes of this species bring out the interesting point 

 that while a concave ventral abdominal surface often designates a male, it is 

 not a universal rule since the male venter in this species is not concave as it is 

 in chickeringi. Secondly, the metasternum may be medianly carinate in the male 

 sex only, or in both sexes. On the other hand, the males have relatively large eyes 

 and a long metasternum, while the females have relatively small eyes and a 

 short metasternum. 



Described from seven specimens as follows: Holotype male collected by 

 the author on July 25, 1936, from moist, stage four (wholly decayed) log mold 

 at Drayton 17, on Barro Colorado Island, Gatun Lake, Panama Canal Zone. 

 One male paratype with the same data. 



Three male paratypes collected by the author, on the same island, July 29, 

 1936, from beneath the loose bark of a log at Pearson 4. 



Allotype female and one paratype female collected by Dr. Eliot C. Wil- 

 liams, Jr., from the same island. The paratype on July 15, 1938 in mold sample 

 No. 1148, and the allotype on July 21, 1938 in mold sample No. 716. 



I take pleasure in naming this distinct species for my colleague, Prof. C. L. 

 Turner, who spent part of a summer with me in the Canal Zone. This is another 

 minute species of Jubus, about the same size as chickeringi, but wholly different 

 in numerous particulars. Jubus turneri belongs in Group II by virtue of the 

 elongate first tergite in both sexes. Its other peculiarities include the two basal 

 elytral foveae, and differently constructed venter. 



This is the first species to be recorded in Jubus between Mexico and South 

 America in Group II. Other species of this group are known from Brazil, Bolivia, 

 and Colombia on the south, and one from Acapulco, Mexico on the north. The 

 Mexican Jubus punctatus (Sharp) is so vaguely described that only a single 

 structural difference can be cited: Sharp notes that punctatu^ has the elytral 

 punctation strong and cribrate, whereas turneri has the elytral punctation very- 

 slight, sparse, and minute; quantitatively, these two species are easily separable 

 on size, punctatus being 2.33 mm. long and turneri significantly less than a 

 millimeter in length. Similarly turneri differs from others in the group by its 

 small size and described anatomy. It is distinct from such large species as brevis 

 Raffray of Bolivia, 1.7 mm. long with dentate humeri, and is more closely allied 

 to the small liliputanus Raffray of Brazil. 



