146 



of about IGO species of insects which he had taken during a 

 two days' stay at Crater Lake, Oregon, in July. 



"Gonatocerns mexicanus," a Mymarid parasitic in the eggs 

 of "Draieculacephala mollipes" in Hawaii. 



BY OTTO II. SWEZEY. 



Two specimens of this Mymarid were caught on sedges 

 at Kapiolani Park, Honolulu, August 26, 1915. In examin- 

 ing the eggs of D. mollipes in sedges, some were found con- 

 taining different parasites than had been previously reared 

 from these eggs here. Rearing some of these parasites they 

 proved to be a Mymarid species, which, on comparison with 

 Dr. Perkins' type of Gonatocerus mexicanus, apparently agrees 

 with it. This species was described from specimens bred by 

 Mr. Koebele from Jassid eggs in grass, Chapultepec, Mexico, 

 in 1907. (Ent. Bui., Exp^ Station, H. S. P. A., 10, p. 21, 

 1912.) 



At that time Koebele was studying egg-parasites of leaf- 

 hoppers, and attempted the introduction of several species 

 from America. This one must have been amongst them, tho 

 there was no rccoi-d of it. My finding it at this time is the 

 first record of its having become established here. 



Ootetrastichus heatus was also bred from eggs of D. mol- 

 lipes collected the same day at Kapiolani Park as the above. 

 This now makes four different species of parasites breeding 

 in the eggs of this Jassid in Honolulu. Two Trichogram- 

 mids: Jassidophthora lidea and Westivoodella caeridocephala, 

 described by Fullaway on pages 22 and 23 of Proc. Haw. 

 Ent. Soc. Ill, 1914. A Eulopid: Ootetrastichus heatus, 

 which parasitizes the sugar cane leaf-hopper and was purposely 

 introduced from Fiji in 1905. A Mymarid: Gonatocerus 

 mexicanus. 



The Anagrus sp. reported on page 9, Proc. Haw. Ent. 

 Soc, III, 1914, as having been bred from eggs of D. mollipes, 

 proved later to be from the eggs of Kelisia paludum, whose 

 eggs w^ere in the same sedges as those of D. nwllipes and were 

 overlooked at the time. 



Proc. Haw. Ent. Soc. Ill, No. 3, September, 1916. 



