542 MEDICAL ENTOMOLOGY 



Fam. ECHINOPHTHIRIIDAE, Enderlein. 



Genus ANTARCTOPHTHIRUS, Enderlein. 

 ECHINOPHTHIRIUS, Giebel. 

 LEPIDOPHTHIRUS, Enderlein. 

 Fam. HAEMATOMYZIDAE, Enderlein. 



Genus HAEMATOMYZUS, Piaget. 

 Enderlein gives the following key for the identification of the above : 



1. Legs formed for clinging. Tibia and tarsus usually very short 



and thick. Tibia with a thumb-like process. Head with- 

 out tube-like prolongation anteriorly 3 



Legs not formed for clinging. Tibia and tarsus very long and 

 slender. Tibia without thumb-like process. Head with a 

 long tube-like prolongation anteriorly, at the point of which 

 the mouth opening is situated ..... Haematom y/idae 2 



2. Antennae five-jointed Haematomyzus. 



3. Body broad and flat. Meso- and metathorax each with a pair 



of stigmata ; stigmata on the second to eighth abdominal seg- 

 ments. Eyes wanting ; posterior part of the head broaden- 

 ed out at the sides. Tibia with short, strong, thumb-like 

 process ; pretarsal sclerite present. Gonopodia in the 

 female elongated, narrow, produced forwards in the middle. 

 Antennae four-jointed. Thick short spines distributed over 



the body Echinophthirlidae 4 



Body flattened. Stigmata on each side of the mesothorax 

 only, and on the third to the eighth abdominal segments. 

 Antennae with three or five joints. Tibia with a thumb-like 

 process 6 



4. Antennae four- jointed 5 



Antennae five- jointed. Thorax and abdomen thickly covered 



with scales, especially on the dorsal surface. A median 

 stripe on the dorsal surface, broadening out posteriorly, 

 without spines Antarctophthirus. 



5. Entirely without scales. Abdomen above and below with 



about three rows of long and strong bristles, equally 



distributed Echinophthirus. 



Only the dorsal surface of the thorax and abdomen covered 

 with scales. Median portion of the dorsal surface of the 

 abdomen without spines Lepidophthirus. 



6. Eyes large, projecting, and distinctly pigmented. * Pharynx 



short and broad. Fulturae very strong and very broad, 

 with broad arms. Proboscis short, hardly reaching to the 

 thorax. Antennae with five or three joints . % . Pediculidae. 

 Eyes very indistinct or absent. Pharynx long and narrow. 

 Fulturae very narrow and lying close to the pharynx. Pro- 

 boscis very long. Antennae with five or three joints . . Haematopinidae 9 



7. Antennae three-jointed f . . . --'--'--- - -^ Pedicininae 



Pedicinus. 

 * See page 539. t See footnote, p. 546. 



