45 



four-wiDgecl creature, about the size of a common house-fly or a little 

 smaller. It is black, and the wings are dusky. The female abdomen is 

 yellowish-brown. The insect is shown in figure 7 in eggj larva, and adult. 

 The larvae figured are, however, not full grown^ We mention this pest 

 here but briefly, as our observations upoi> it are by no means comi)lete, 

 and simply to place the fact on record and to elicit any information 

 which others may possess upoti the subject. 



THE MORELOS ORANGE FRUIT-WORM. 



(Tryijeta ludens Loew.) 



[Order Diptera: Family TuYPETiDiE. ] 

 By C. V. Riley. 



We have for some time been aware of the existence in Mexico of a 

 worm which damages the fruit of the Orange, boriug into the pulp antl 

 renderiug it unfit for eating puri^oses. It has been describetl to us by 

 non-naturalists as a large, white worm of perhaps an inch in length, of 

 which no sign could be seen from the outside of the fruit. Thie exist- 

 ence of such a fruit- worm in Mexico has always seemed importiant. to* 



Fig. 9.— Trypeta ludens. a, larva enlarged ; h, anal segment of same form behind— still more en- 

 larged ; c, puparium— enlarged ; d, e, head and aual segments of same— still more enlarged ; /, adult 

 female — enlarged (original). 



US on account of the dauger of importation into the orange-growiug 

 regions of the United States, and we have several times instructed our 

 agents who were visiting New Orleans, into the markets of which Mexican 

 oranges are largely imported, to search for infested fruit. Mr. Howard 

 in 1881 ascertained that the fruit dealers in New Orleans were familiar 

 with the existence of such a worm, but during the time at his disposal 

 he was unable to obtain specimens. In the summer of 1887, however, 



