OF WASHINGTON. 139 



Azotus marchali new species. 



Male. Length .44 mm.; expanse 1.4 mm.; greatest width of fore, 

 wings .23 mm. Fore-wings with longest marginal cilia a trifle more than 

 one-third wing width ; discal cilia regularly distributed except that there 

 is a triangular clear space below marginal vein and another below stig- 

 mal ; hind wing with two irregular incomplete rows of discal cilia; mar 

 ginal cilia about as long as the wing breadth; fore-wings rather irregu 

 larly infuscated on basal half; antennal scape slender; pedicel short; 

 funicle joints i, 2 and 4 subequal in length, i slightly longer, each much 

 longer than pedicel; funicle joint 3 very short, as broad as long, about 

 one-fifth as long as 2 ; club nearly twice as long as funicle joint 4, about 

 five times as long as broad. General color brown, face yellowish, femora 

 light at tips, tibiae light at either end, tarsi nearly white except basal and 

 terminal joints ; antennae light brown; eyes bright red. 



Type. No. 3647, U. S. N. M. 



Described from one specimen, apparently a male, reared by 

 Prof. Paul Marchal, of Paris, June, 1896, from Diaspis ostrece- 

 formis on pear, together with many specimens of Archenomus 

 bicolor, to the male of which it bears a superficial resemblance, 

 but from which it is immediately separated by its 5-jointed tarsi. 

 Later a single specimen was received from Mr. Wm. M. Maskell, 

 which he had reared from Aspidiotus neriion Baloghia lucida, 

 received from Sidney, N. S. W. 



In discussion Mr. Ashmead expressed great interest in the 

 paper and congratulated the author both on the discovery of the 

 male of Arrhenophagus and upon the remarkable facts ascertained 

 concerning its distribution. He stated that the paper illustrated 

 well the impossibility of mapping the geographical distribution 

 of parasitic Hymenoptera, since these insects always follow their 

 hosts. Mr. Schwarz expressed a disagreement with Mr. Ash- 

 mead and thought that such extraordinary instances of distribu 

 tion as these referred to by Mr. Howard could hold only with 

 the parasites of scale-insects. If Mr. Ashmead's claim were true 

 we could import parasites from many portions of the world with 

 the certainty that they would acclimatize themselves. Mr. Ash- 

 mead stated that the rule would hold for other parasitic Hymen 

 optera as well as for the parasites of scale-insects, and instanced 

 many species which he had found to be cosmopolitan, stating that 

 we probably have many more, but that the specific study of these 



