NEW MAI.I.ol'IIACA. 



•J19 



development of the reproductive organs lias already 

 been referred to. Melnikow (1S(')!I) made a more general 

 study of the embryology, I'Ut since he concluded from 

 his investigations that the Mallophaga are closely related 

 to the Pediculidie — a conclusion entirelv untenable — 

 his work cannot be very accurate. He proves that there 

 is present a beak but no labium, and hence that the 

 moutli-parts are HemipteranI 



\'ii. SUM.MAJiY. 



The foregoing descriptions of the various systems of 

 organs of the Mallophaga show that the two suborders 

 are separated by wide structural differences. These 

 may be tabulated as follows: 



A iiibli/cera. 



Mesonotnm and Mciauutuui Distinct. 



AuteuniB concealed. 



Auteuuiv clavate. 



Mandibles horizontal. 



Labial palpi prest-iit. 



Paragloss:o various in form. 



(Esophageal sclerite and con- 

 nected glands absent or Uiod- 

 ified. 



Crop simple. 



Salivary glands varions in form, 

 luglnvial glands absent. 

 Testes six. 

 Chitiuon.s " genitalia simple. 



Egg-tubes; three to Kve. 



Ischnuceva. 



Meso- 



\ Metanotiuu Fused. 



Antenna- exposed. 



Antenuie uol clnvate. 



Mandibles vertical. 



Labial palpi absent. 



Paraglossa- constant in form. 



(Esophageal sclerito and con- 

 nected glands jnesent and 

 normal except in a few skit- 

 tered cases. 



Crop an osophageal divertic- 

 ulum. 



Salivary glands constant in form. 



Ingluvial glands present. 



Testes four. 



Chitinons f genitalia more 

 complex. 



Egg-tubes five. 



