57 



ing- the opposite margin ; apical Dortion of wing hairy and large!;. 

 occupied by a large blackish fuscous cloud, the stigmal, marg^ina'; 

 and postmarginal veins still blacker, but the postmarginal appears 

 to extend a little beyond this black area. Abdomen as long as 

 the thorax, but much smaller in bulk, shining, depressed above, 

 as is usual in dead Encyrtids, this being a usual post mortem 

 change. Length 1.5 mm. 



HAB. Nogales, Arizona ; bred, no. 2444. 



Saronotitni Perk. 



This hyperparasite was bred (no. 2448b) from the cocoon of 

 Neogonatopus niimns and appears to be almost or c[uite identical 

 with the Australian form. I am therefore inclined to think that 

 Saronotum ainericanimi and 6^. ausiraliac are one species, my orig- 

 inal example of the former being merely a variation of the latter. 

 Mr. Koebele captured what might be the male of Saronotmn. It 

 has longer antennae and only rudimentary wings and differs in 

 other characters, such as are probably only sexual. Other in- 

 stances of Chalcids that are parasitic on other Hymenoptera hav- 

 ing flightless males and fully winged females are known to me, 

 but I should hesitate to describe the specimen in question as a 

 male of Saronotmn without further evidence. 



EULOPHIDAE. 



When in Australia, the possibility of the Tetrastichine, Ootc- 

 trastichiis beatns, being hyperparasitic at once suggested itself 

 to us, but the idea was discarded. Later on, breeding of the spe- 

 cies in confinement for several generations made it appear cer- 

 tain that it was a primary egg-parasite, and not bred at the ex- 

 pense of the Mymiarids. Subsequently Dr. L. O. Howard called 

 my attention to the fact that theoretically it ought to be a hyper- 

 parasite. Ashmead has recently described certain Tetrastichines 

 as being parasitic on Mvmaridae, but w^ithout valid proof of the 

 relationship. Accordingly I carried out some further experiments 

 with Ooteirastichus beat its, raising cane-plants indoors in covered 

 glass jars, then introducing leaf-hoppers and finally specimens of 

 the oarasite. In the two "^jars employed, everv leaf-hopper egg 

 that was laid in the leaves was destroyed by the Ooteirastichus. 

 When voung the larva lives within one of the hopper's eggs, like 

 a Mym'arid. but later on emerges and destroys the other eggs m 

 the egg-chamber; then usually bores a gallery for some length 



