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Abosso for Teneriffe. On tlie second dav out tlie parasites began 

 to emerge from the older material and continued to come out for 

 ten days or more. Somewliat to my surprise tbe material produced 

 in addition to Tetrastichus two Braconid species, quite readily dis- 

 tinguished by their color, one being black, the other a brownish 

 yellow. The latter was afterwards determined to be Diacliasma 

 fullawayi, a species discovered by Prof. Silvestri on the previous 

 trip ; the black species is possibly new. I had, then, as a result of 

 the few weeks spent in JSTigeria, Tetrastichus, three Oipius forms 

 (counting the individual taken alive by Bridwell in Ebute-Metta) 

 and a few individuals of a Spalangia found in working over the 

 infested fruits of the Momordica. These parasites were kept alive 

 in glass tubes stoppered with cotton by feeding them honey placed 

 in small drops on the leaves of an evergreen shrub which wae 

 carried along with me. On the morning of the 24th we touched 

 at Freetown, Sierra Leone, and I was here obliged to leave the 

 ship and go ashore, as cable orders had been received from the 

 British Admiralty directing the ship to proceed at once to Liver- 

 pool for trooping, without calling at Teneriffe. The next day, 

 however, a freighter appeared which would call at Teneriffe, and 

 I embarked that afternoon on the S. S. Eboe, the vessel sailing 

 the following morning. The passage from Sierra Leone to Tener- 

 iffe, which is ordinarily made in six days, was now lengthened out 

 to twelve, as our carrier, being a freighter, was obliged to call at 

 Conakry, Dakar and Bathurst for cargo on the way up. But 

 this delay while it caused me a great deal of anxiety on account 

 of the possibility of the parasites dying en route, gave me time to 

 conduct some experiments with Tetrastichus in the Mediterranean 

 fruit fly, which I had been breeding in storage apples since our 

 arrival at Olokemeji. Before reaching Teneriffe, therefore, I 

 was able to determine (1) that Tetrastichus giffardi was a larval 

 parasite, ovipositing in worms half to full grown, (2) that it 

 would parasitize the Mediterranean fruit fly; and (3) that it was 

 a primary parasite, since it bred in Ceratitis capitata in pure 

 culture ; besides getting a new lot of parasites from individuals 

 used in the experiment. 



We arrived in Teneriffe the morning of September 5th, and 

 after unpacking my equipment and arranging a temporary labor- 

 atory at the hotel, I went to the fruit markets to see if suitable 

 fruits could be obtained for the propagation of the parasites. 

 Emit was very abundant in the markets, but peaches were the 

 only kind that was heavily infested and suitable for the work. 

 I began the multiplication of the parasites at once, and in three 

 weeks had accumulated a large amount of material. 



I had planned on leaving Bridwell to remain in Teneriffe 

 until he should join me in November, but information received 



