196 



Acarology 



tarsi possess two claws and an empodium (the claws on Lordalycus 

 have ventral rays; the pulvillus is rayed) . The femur is divided into basi- 

 and telofemur. Two pairs of genital suckers are present. 



Genera: 



1. Lordalycus Gv2ind]Q2kn, \9?>9 



Type. Lordalycus peraltus Grandjean, 1939 



2. Hybalicus Berlese, 1913 



Type. Hybalicus fiabelUger Berlese, 1913 



Discussion: The discovery, with the aid of the phase microscope, of 

 the prostigmatic type of tracheal systems opening at the base of the 

 chelicerae in four families of the Endeostigmata of Grandjean indi- 

 cates a definite relationship to the Prostigmata. The Endeostigmata 

 form a closely knit group of families (Terpnacaridae, Pachygnathidae, 

 Alicorhagididae, Nanorchestidae, Lordalychidae and Sphaerolichidae) 

 and are at present retained within the Prostigmata. The families are 

 little known and only a few species and genera have been described. 



Reference: 



Grandjean, F. 1939. Quelques genres d'acariens appartenant au groupe 

 des Endeostigmata. Ann. des Sci. Nat., Zoo!., Ser. 11, 2: 1-122. 



Sphaerolichidae Grandjean, 1937 



Figures 137-139 



Figure 137 Sphaerolichus barbarus 

 Grandjean. Dorsum of female. (After 

 Grandjean 1939) 



Diagnosis: These mites have a 

 whitish or yellowish color (in al- 

 cohol). They are small to medi- 

 um-sized (from 0.30 to 0.40 mm. 

 long) . The body is globular, thick, 

 and round while the skin is soft 

 and striated or has punctiform 

 striae. The propodosoma has a 



Figure 138 Sphaerolichus barbarus 

 Grandjean. Lateral view of chelicera. 

 (After Grandjean 1939) 



