Hydrachnellae 313 



Frontii)odopsinae Viets, 1931 



Genus: 



Frontipodopsis Walter, 1919 



Type. Frontipodopsis staheli Walter, 1919 



Mideidae Viets, 1929 



Figures 244, 245 



Diagnosis: The mideids have a highly arched body which is armored 

 and has a dorsal suture. The palpal femur and genu are strong while 

 the tibia is thin, narrow, longer than the femur and genu combined, 

 and lacks inner protuberances. The coxal plates are combined in one 

 group; coxal plates i are united medianly and coxal plates iv are tri- 



Figure 244 Midea expansa Marshall. Figure 245 Midea expansa Marshall. 

 Ventral plates. (After Marshall 1940) Dorsum. (After Marshall 1940) 



angular in shape. Legs ii, iii, and iv have swimming hairs. Tarsi iii 

 of the male are clasping organs. The genital indentation is large, reach- 

 ing to the rear of coxae i; the genital organ is located between coxal 

 plates IV. In the female the genital organ has sickle-like, sucker-bear- 

 ing plates each with from five to seven pairs of suckers. In the male 

 each plate has five to six pairs of suckers. The genital plates of the 

 male have a three-cornered, movable, sclerotized wing. 



Genus: 



Midea Bruzel., 1854 



Type. Hydrachna orhicidata Mliller, 1776 



