The Behaviour of Plasmodia in the Mosquito after Treatment of the Human Host with Atebrin

more complete. We may say that we have been working for some time on the side of the subject indicated by the above title with several drugs and hope to be able to submit our more" general results at a later date. With regard to our present observations they were made on the following case of human malaria. A Mahommedan male, aged 23, suffering from malignant tertian malaria was on December 12th when showing 24,600 trophozoites to the cubic millimetre put by Dr. Napier on to a course of Atebrin, viz, three daily doses of 0.1 gramme for 4 days. On December 14th, the patient's blood showed 2,320 parasites, including a few crescents, per cubic millimetre. On December 15th this being the final day of the Atebrin treatment we fed 10 female Anopheles stephensi on the patient who was this day showing 200 crescents per cubic millimetre. The mosquitoes were thereafter kept under the prevailing physical conditions in the laboratory and dissected, with the following results :?