LIST OF ILLUSTRATIONS. 



Page. 



A NEW GENUS OF TrEMATODES FROM THE WhITE BaSS. 



By H. J. Van Cleave. 



1. Series of outline drawings, all to same scale showing relative size and body 



form of individuals of Allacanthochasmus varius. Relative position of 

 acetabulum and two testes shown in each drawing 3 



2. Details of structure oi Allaamthochasmus varius. The uterus is completely 



filled with eggs, but for convenience in this drawing is shown in flat 

 stippling. Vitellaria of dorsal intercecal region have been omitted, as 

 have also the cuticular spines. The scale accompanying the drawing 

 has the relative value of 0.1 mm 4 



Ants from Hunduras and Guatemala, 



By William M. Mann. 



1. Thaumatomyrmex ferox, new species. Head of worker 3 



2. Opisthoscyphus scabrosus, new species. Head of worker 5 



3. Opisthoscyphus scabrosus, new species. Lateral view of worker 5 



4. Belonopelta (Belonopelta) deletrix, new species. Head of worker 10 



5. Leptogenys {Leptongenys gagates, new species. Head of worker 11 



6. Leptogenys (Leptogenys donisthorpei, new species. Head of worker 12 



7. Leptogenys {Lobopelta) honduriana, new species, a, head of worker; b, 



thorax and petiole 13 



8. Leptogenys (Lobopelta) imperatrix, new species. Worker, a, thorax and 



petiole; b, head; c, petiole from above 16 



9. Eciton (Acamatus) impudens, new species. Worker 19 



10. Stenammafelixi, new species. Worker, a, head; b, thorax and abdomen. . 22 



11. Aphaenogaster (Demomyrma) honduriana, new species. Worker. 24 



12. Pheidole {Elasmopheidole) hondurensis, new species. Soldier, a, head; 



b, thorax and petiole 25 



13. Pheidole tvalkeri, new species. Soldier, a, head; b, head, thorax, and 



petiole 27 



14. Macromischa scandens, new apecies. Worker 30 



15. Rogeria inermis, new species 32 



16. Acanthognathus lentus, new species. Head of worlcer 34 



17. Strumigenys (S trumigenys) ludia, new species. Head of worker 36 



18. Strumigenys (Strumigenys) emeryi. Head of worker 37 



19. Rhopalothrix (Rhopalothrix) gravis, new species. Worker, a, head; b, 



thorax and petiole. (Only the larger hairs are shown) 40 



20. Myrmecocrypta ednaella, new species. Worker, a, head; b, thorax and 



petiole 47 



21. Sericomyrmex opulenta, new species. Worker, a, head; b, thorax and 



petiole 48 



22. Apterostigma abdita. Thorax and petiole of worker 50 



Description op the Skull of Megaptera Miocaena, a Fossil Humpback 

 Whale prom the Miocene Diatomaceous Earth of Lompoc, Cali- 

 fornia. 



By Remington Kellogg. 



1. Dorsal view of right periotic of Megaptera miocaena X 1, Cat. No. 10300, U. S. 



N. M. ; Lompoc, California 10 



2. Posterior view of left periotic of Megaptera nodosa X 1, Cat. No. 21492, U. S. 



N. M.; Cape Cod, Mass 11 



