LIST OF ILLUSTRATIONS. 



PLATES. 



North American Sawflies of the subfamily Cladiinae. 



By S. A. Rohwer and William Middleton. 



Facing page. 

 1-7. North American Cladiine sav^flies 38 



North American Parasitic Copepods Belonging to the Family Dichelesthiidae. 



By Charles Branch Wilson. 



1 . Anthosoma crassum and Lernanthropus caudatus 98 



2. Females of Lernanthropus caudatus and L. rathbuni 98 



3. Lernanthropus rathbuni and L. leidyi 98 



4. Females of Lernanthropus leidyi and L. chlamydotus 98 



5. Female of Lernanthropus chlamydotus 98 



6. Lernanthropus chlamydotus and L. paenulatus 98 



7. Lernanthropus paenulatus and L. brevoortiae 98 



8. Female of Lernanthropus brevoortiae 98 



9. Female of Nemesis atlantica 98 



10. Female of Nemesis atlantica and male of Lernanthropus brevoortiae 98 



11 . Female of Eudactylina nigra 98 



12. Eudactylina nigra, Pseudocycnus appendiculatus, and P. buccatus 98 



13. Pseudocycnus buccatus, Lernanthropus chlamydotus, and Dichelesthium 



oblongum 98 



A Contribution to the Anatomy op Dinobothrium, a Genus of Selachian 

 Tapeworms; with Descriptions op Two New Species. 



By Edwin Linton. 



1. Scoleces of Dinobothrium, plicatum and D. planum 10 



2. Dinobothrium plicatum from Carcharodon carcharias 11 



3. Dinobothrium planum from Cetorhinus maximus 12 



4. Dinobothrium planum from Cetorhinus maximus 13 



The Centipeds of Central America. 



By Ralph V. Chamberlin. 



1-4. Centipeds of Central America 18 



The Millipeds of Central America. 



By Ralph V. Chamberlin. 



1-25. The millipeds of Central America 72 



vn 



