314 Journal of Agricultural Research voi. x. no. 6 



THE CAMBIUM MINER IN SERVICE BERRY 

 DESCRIPTION 

 THE ADUI.T 



Agromyza amelanchieris, n. sp.' 



Male and female. — This species closely resembles Agromyza aceris, but is easily 

 separated from it by its smaller size and the following differences: Black, slightly 

 more opaque on the frons and thorax. Frons faintly depressed in the center, half as 

 wide as head; red area above lunule wide; orbits fairly wide; five orbital bristles; 

 microscopic hair present; ocellar triangle with longer black hairs; area between 

 limule and base of antennae narrower and paler yellow; first and second joints of an- 

 tennae dull, dark reddish brown; third joint rounded, dull black, inner basal comer 

 reddish; arista black, only slightly longer than upper orbital bristles; face opaque 

 black, keel indistinct; facial depression with a very faint reddish reflection on each 

 side; narrow red area on each side of face wanting; along upper part of oral margin 

 narrower, reddish yellow; dorsum of thorax nearly opaque; abdomen blacker and 

 more shining than thorax; hypopygium of male entirely black; legs, knees, and 

 trochanters black; wings hyalin, veins nearly black; outer cross vein its own length 

 from inner cross vein. 



Length, male and female, 3 to 3.5 mm. 



Type locality. — French Creek, W. Va. Mr. F. E. Brooks, collector. 



Type. — Female, Cat. No. 21063, United States National Museum. 



Allotype. — Male. 



Described from seven specimens. 



THE LARVA 



The larva (PI. 48, C) is quite similar to that of Agromyza aceris, except for the follow- 

 ing differences: It is longer and more slender; the cephalopharyngeal skeleton is 

 longer and not so robust; the anterior and posterior pairs of spiracles are slightly 

 smaller; and the small chitinous plates on the sides, below the middle of the last 

 segment, are arranged in four rows instead of three. 



For further details see Plate 48, C. 



Length, 20 to 25 mm.; diameter, 0.65 to 0.85 mm. 



THE pupa 



The pupa (PI. 48, D) is paler yellow and very much more pointed than that of 

 Agromyza aceris. The grooves along the segmental lines are not so pronounced. The 

 cephalic end of the pupal case is missing. The posterior spiracles are reddish, not 

 quite so prominent and a little more elongated on the apex, plainly showing the 

 three circular plates with the dorsal slit. The anal depression is reddish in the center. 

 Otherwise it is like A . aceris, although very slightly smaller. 



SEASONAL HISTORY 



During June and the early part of July the larvae were collected at 

 French Creek. W. Va. They were nearly full grown and were taken 

 from the trunk near the ground and from the roots. According to Mr. 

 F. E. Brooks, who discovered them, "the larv^ae leave a threadlike 

 reddish line in the cambium. " Nearly full-grown lar^^ae were collected 

 at French Creek from June 10 to July 6, 1915. The time of pupation 



1 Submitted to the writer for study through the courtesy of Dr. A . L. QuaLatance, Entomologist in Charge 

 of Deciduous Fruit Insect Investigations, Bureau of Entomology. 



