REVISION OF ELEODITNI BLAISDELL. 17 



The tarsi are g^rooved beneath by the phintar grooves. 



Each tarsal joint is more or less obconical and grooved beneath. 

 The sides of the groove are set with a row of marginal spiuides, the 

 apical margin also bears a row of apical spinules. At the apex Avhere 

 the apical meet the marginal row, the spinules are usually longer and 

 more conspicuous as acute tufts; these are the aplco-marginal tufts. 

 (See Plate 8, fig. 225.) 



The first two joints of the anterior tarsi are frequently thickened 

 and somewhat produced at apex beneath (Plate 8, fig. Ort), obliterat- 

 ing the groove. When the apex is thickened beneath it nearly always 

 bears a tuft of yellowish pubescence, especially in the males of many 

 species, and sometimes in the female a tuft of spinules. 



In the males of the subgenus BlapyUs it is normal to observe on 

 rhe first and second joints of the mesotarsi similar tufts on the tips 

 beneath. This is also observed in some species of Promus. 



The ultimate joint of each tarsus at apex has the margin above 

 feebly bilobed ; beneatli the margin is produced into an interungual 

 process, which varies considerably in shape but is probablj^ of no 

 value in the separation of species. (See Plate 6, fig. 18.) 



The ungues are slender and acute, moderately arcuate, and slightly 

 subangulate at base beneath. (Plate 6, fig. 19.) 



Ahdornen. — Ventrally there are only five visible segments, while 

 dorsally there are six. 



Morphologically the first visible ventral segment is the second; 

 the study of the retractile segments requires that this be recognized 

 as such. 



The first segment dorsally in the mid-line is as long as the second ; 

 laterally it gradually narrows so that, it points at the bases of the 

 metasternal epimera. 



Ventrally the first segment is greatly reduced, and although un- 

 differentiated it forms a part of the metacetabular walls, reaching 

 the sides of the abdomen to appear as a small and short sclerite, con- 

 nate with the externo-anterior angle of the second segment (first 

 visible), dorsad to the base of the metasternal epimeron, and at the 

 point wdiere the evident dorsal membranous first segment reaches the 

 abdominal rpiargin. 



There are six pairs of ahdom'inal stigmata^ and in the male are 

 located on each side as follows: 



The fi7'st stigma is situated about ^ mm. above the posterior margin 

 of the metathoracic stigma. 



The second is about 0.8 mm. above the lateral edge of the second 

 ventral (first visible) segment and on a line drawn transversely 

 across the posterior margins of the metacetabula. 

 59780— Bull. 63—09 2 



