512 ON THE DEVELOPMENT OF DERMATOBIA HOMINIS. 



James, J. F. 



'89. A "Human Parasite." Amer. Nat., vol. 23, no. 265, p. 65. 

 Magalhaes, P. S. de. 



'96. Observations sur les Dermatobies. Bull. soc. zool. France, vol. 21, pp. 178-179. 

 Matas, R. 



'87. Report of the Case of a Patient from whose Subcutaneous Tissue Three Larvse of a Species of Der- 

 matobia were removed, with Remarks. New Orleans Med. Surg. Jour., vol. 15, pp. 161-179. (Re- 

 printed in part as A Man-infesting Bot. Insect Life, vol. 1, no. 3, pp. 76-80.) 

 Penniston, T. 



'44. A Case of Malis Oestri, or Gadfly Bite, Occurring in the Human Subject. New Orleans Med. Surg. 



Jour., 1844, pp. 24-27, 1 pi. 

 Say, T. 



'22. On a South American species of Oestrus which inhabits the human body. Jour. Acad. Nat. Sci. 



Philadelphia, vol. 2, pp. 353-360. 

 Verrill, A. E. 



'70. The External Parasites of Domestic Animals, their Effects and Remedies. Rep. Connecticut Board 



Agric. 1870, pp. 111-251. 

 Verrill, A. E. 



'72. Additional Observations on the Parasites of Man and Domestic Animals. Rep. Connecticut Board 

 Agric. 1871-72, pp. 321-342. 



EXPLANATION OF PLATES XXXV-XXXVI. 



All the figures are taken from three larvae of Dermatobia hominis collected in Costa Rica by Mr. M. A. Car- 

 riker, Jr. Larva No. 1 was taken from a toucan (Rhamphastos tocard) ; larvae Nos. 2 and 3 from a human being. 



PLATE XXXV. 



Figs. 1 to 3. Dorsal, lateral, and ventral views respectively of larva No. 1, from the toucan. X6. 



Fig. 4. Lateral view of anterior somites from larva No. 1, showing arrangement of hooks on first and second somites, 



and mouth parts of right side. X25. 

 Fig. 5. Terminal somites of same larva, No. 1, in lateral aspect, showing form and armature of penultimate and 



ultimate somites. The anal orifice appears as a crescentic slit and the two stigmal fields just dorsal 



to it are also shown. X25. 

 Figs. 6 to 8. Dorsal, lateral, and ventral views respectively of larva No. 2, the larger larva from a human being. 



Note in Figure 6 the arrangement of the hooks and bosses about the median line. X6. 

 Fig. 9. Posterior end of larva No. 2. X12. 

 Fig. 10. Anterior end of larva No. 2, viewed en face. X12. 



PLATE XXXVI. 



All figures on this plate are drawn from larva No. 3, the smaller one of the two from the human being. The 

 specimen was molting. 



Figs. 11 to 13. Dorsal, lateral, and ventral views respectively of larva No. 3. Only the hooks on the outer skin 



are represented. X6. 

 Fig. 14. Anterior end to show mouth parts, rudimentary antennae and arrangement of hooks on the first two 



somites. X15. 

 Fig. 15. Mouth parts viewed as transparent objects to show the short sharply curved hooks of the earlier stage 



and the longer, heavier, and less bent hooks of the next later stage. X33. 



