370 



Acarology 



man. Ferris 1928 has found M. anchora "attached by their beaks to 

 the body of the fly host," usually to the abdomen although one speci- 

 men was found on the thorax; Sergent and Trouessart found them on 

 both thorax and abdomen. The mites are true parasites of flies, and 

 scars are formed at the point of attachment by the deposition of addi- 

 tional chitin, an indication of long periods of attachment. Males arc 

 not known and it has been suggested by some that they may be found 

 on the.bird hosts of flies. 



References: 



Cooreman, J. 1944. Un nouveau cas d'hyperparasitism parmi les Acaridiae: 



Mykilgopsis trinotoni n. gen. n. sp. parasite d'un Mallophage. Bull. 



Mus. Roy. d'Hist. Nat. de Belgique 20(26) : 1-12. 

 Ferris, G. F. 1928. The genus Myialges (Acarina: Sarcoptidae). Ent. 



News 39(5): 137-140. 

 Oudemans, A. C. 1935. Description du Myialges anchora Sergent et 



Trouessart 1907 (Acarien). Ann. de Parasitol. Humaine et Compar. 



13(1):5-11. 



Psoroptidae Canestrini, 1892 



Figures 301, 302 



Diagnosis: With few exceptions 

 the psoroptids are parasites of 

 mammals. No vertical setae are 

 present but there are dorsal 

 shields. Bell-shaped caruncles are 

 found on long, segmented stalks 

 (Psoroptes), or short, unseg- 

 mented stalks appear on all tarsi 

 in the male (except on tarsi iv of 

 Psoroptes) and, on tarsi i, ii, and 

 IV in the female (except in Oto- 



Figure 301 Psoroptes eqiii var. ovis 

 (Hering). Dorsum of male. (After 

 Hirst 1922) 



Figure 302 Otodectes cynotis (He- 

 ring). Tip of leg I. (After Grandiean 

 1937) 



