PSEUDONEUROPTERA. 8$ 



A A. Antennae clubbed, four-jointed ; maxillary palpi long, filiform, four-jointed. 

 B. Tarsi with two claws. Parasites on birds. 

 C. Mesothorax wanting ; antennae always concealed. 



D. Head very broad ; no orbital sinus. 7. EURHM. 



DD. Head elongated, with lateral angles directed backwards. 

 E. With sharply marked off cypleus, and shallow orbital sinus. 



8. L^MOBOTHRIUM. 



EE. With only wavy head-margins, and long lateral lobes on the 

 labrum. 9. PHYSOSTOMUM. 



CC. Mesothorax present. 



D. Mesothorax large, sharply marked off ; head three-sided ; antennae 

 concealed. 10. TRINOTUM. 



DD. Mesothorax small, only indicated*. 



E. Orbital sinus deep ; antennae usually elongated and visible. 



II. COLPOCEPHALl M. 



EE. Orbital sinus very shallow or obsolete, antennae concealed. 



12. MENOPON. 

 BB. Tarsi with a single claw. Parasites on mammals. 13. GYROPUS. 



The following is a list of the described species of the Mallophaga which 

 infest domestic animals; in each case the host is indicated : 



i. TRICHODECTES. Trichodlctes Idtus (Fig. 79), dog; T. restrains, c. 

 *yw/(Fig. 78), horse and ass; T. br&vtceps, llama; T. climax, goat; T. sphero- 

 cepiialus (Fig. 80), sheep; T. scaldris (Fig. 81), ox. 



<ctft FIG. 80. Tricko- Fi<;. 81 Trickttcttt FIG. 8a.-OrW/< */- 

 iatmt. (From Law.) ^,<* ff . : romLaw.) (From Law.) 



tkalmt. (From 



2. DOCOPHORUS. Docdpkorus aduslus, goose ; D. icttrodts, duck. 



3. NIRM wus davcrfdrmis, pigeon; A*, nfimida, Guinca-fow 

 tcssclldtus. duck. 



4. GONIOCHOTF.S. Gonidf/i ''iir, pigeon; G. //., Guinea-fowl ; G. 



'/us. peacock ; G. - asant ; G. kologdstfr, hen. 



DES. Goniodfs numididnus, Guinea-fowl; G. sty/if tr (Fig. 82), 



