Vol. xxiii] ENTOMOLOGICAL NEWS. 3 6j 



in Kellogg's key to the Mallophaga; ($) front rounded, sides 

 straight, the ocular emarginations being completely filled ; ocu- 

 lar fleck prominent; a pair of heavy hook-like spines on the 

 under side. Thorax well developed. Mesothorax a distinct 

 segment, much smaller than the pro- or metathorax. Legs and 

 abdomen well developed. Mammal infesting, probably charac- 

 teristic of dogs. 



Heterodoxus macropus Le Souef & Bullen (Figs. E, F, G). 



Four specimens of this species, two males and two females, 

 from a black Wallaby (Victoria) were kindly sent by Mr 

 Le Souef. The species is well described in the authors' paper 

 before mentioned except for the omission of reference to tl e 

 mesothorax. This segment is small, consisting of a narrow, 

 short plate on the dorsum with a short, heavy spine on each 

 side; sides rounded. (Fig. E.) 



DIMENSIONS. 



Length Width 



Male Female Male Female 



Head 42 -45 -62 .66 



Prothorax 29 .30 .56 .60 



Mesothorax 13 .14 .20 .22 



Prothorax 29 .30 .56 .60 



Abdomen 1.44 1.86 .96 1.06 



Total 2.68 3.00 



Dr. G. Enderlein has described a parasite from a South 

 African dogf under the name l\Ienopon spiniger. His descrip- 

 tion and figure, however, both agree so closely with our speci- 

 mens of H. macropus that it is impossible to separate the two 

 species. Owing to priority therefore, M. spiniger becomes a 

 synonym. Thus we have both species of the genus Hetero- 

 doxus occurring on the dog, which animal is probably its char- 

 acteristic host. 



fEnderlein, G., Anopleuren & Mallophagen ; Schultze, Forschungs- 

 reise in Sudafrika, II ; Jenais-Dcnkschr. XIV, 1909. 



