REI4ARKS 



Miscellaneous observations on H. detritum (= H. mauritanicum ) 

 by Sergent, Donatien, Parrot, and Lestoquard ^1%^ concern para- 

 sitism of an engorged nymph by a nymph of the same species; re- 

 generation of appendages mutilated in the immature stages; mon- 

 strosities; progeny of intermated adults from a single egg batch; 

 and negative results of various attempts to crossbreed this spe- 

 cies with H. excavatum . I-tost of these data derive from publica- 

 tions listed under ALGERIA above. 



Desportes (1938) described a nymph of H. detrittim (r H. 

 mauritanicum ) with two anuses and a third spiracular plateT Other 

 abnormalities have been noted by G. Senevet (1922A) and by Sergent 

 and Poncet (19/+1). Abnormal specimens and gynandromorphs have 

 been described by PavlovsI<y (19^0), 



According to Schulze (1921), "H. scupense " may become over- 

 grown by the host skin when it feed's on tne scrotum of sheep. 



In attempts to determine whether feeding by tick larvae may 

 prodvice host immunity preventing the feeding of subsequent larvae 

 on the same host, Brumpt and Chabaud (194-7) found that while pos- 

 sibly some immunity may develop from the bites of Dermac enter 

 f ictus this does not hold when larvae of H. detritum are applied 

 ater to the same animal. ~ 



Skin lesions, a powerful salivary anticoagulin, and an egg 

 toxin that did not, h(3wever, produce symptoms of tick paralysis 

 have been studied by Hoeppli and Feng (1933). 



Schulze (1932c) utilized males and females of H. detritum 

 to illustrate his point that on unornamented ticks Tongitudinal 

 furrows are found in constant situations; these indicate the 

 place of attachment of the weakly transversely- striated dorso- 

 ventral m\ascles, etc. In the same paper, the molting of "H. 

 scupense " from nymph to adult is discussed in relation to ~ 

 ornamentation of the body surface. 



A condition similar to polymorphic eczema among mammals 

 has been described and illustrated for Yugoslavian females of 



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