40 INSECTS AFFECTING THE ORANGE. 



The perfect insect is a four-winged fly, 1.2 mm (0.05 inch) long, honey- 

 yellow in color, and with dark brown eyes. The antennae have appar- 

 ently six joints, but the last three joints are closely united into an 

 elongate club, and the real number of joints is therefore eight. The 

 abdomen is rather broadly oval, and in the female bears on the middle 

 of her under side*thc sharply-pointed egg-drill. 



The larva is a yellowish-white, naked grub, so thick and short as to 

 be almost spherical. It is without visible members, even the head being 

 withdrawn out of sight into the body. The body is plainly ringed, in- 

 dicating the joints, and the dark intestinal contents are seen as a red 

 or brown cloud through its walls. Length ().5 mm (0.012 inch). 



The pupa is twice as long as wide, flattened, oval, and has a tinge of 

 yellow color. It shows the form of the perfect insect through the trans- 

 parent envelope.* 



THE ORANGE CHIOXASPfS. 

 (Chionaspis citri Comstock.) 



A new Bark-louse of the Orange has been described by Professor 

 Comstock, in the Second Entomological Report of Cornell University, 

 as follows: u In the Report of the Department of Agriculture for 1880 I 

 described a species of Chionaspis which differed from all other species 

 of that genus known at that time by the color of the scale of the female, 

 which is black. This species was found on Eaony nus latifolia at Nor- 

 folk, Va. 1 stated in my account of this insect that it occurred also on 

 orange trees in Louisiana and Cuba. A rc-examiiiatioa of the speci- 

 mens on orange has convinced me that they arc specifically distinct 

 from those on euonymus. I therefore propose for that form the specific 

 name of citri. The species can be recognized by the following characters : 



" Scale- of Female. The scale of the fomale is of a dirty blackish brown 

 color with a gray margin ; the exuviae are brownish yellow. There is 

 a central ridge from which ^he sides of the scale slope like the roof of a 

 house. The greater prominence of this ridge, and the more elongated 

 form of the scale are the principal differences between this scale am\ 

 that of the female of Ch. euonymi. There is no danger of its being mis- 

 taken for any other known species. 



"Female. * * * This species may readily be distinguished from 

 Ch. euonymi by the following characters : There are no groups of spin- 

 nerets; the mesal lobes are larger and more distinctly serrate than in 

 (Ght euonymi; and in the last-named species the plates are m twos, while 

 ; in Ch. citri they occur singly." 



According to observations made by Mr. L. O. Howard, the Orange 

 Chionaspis is theespecial pest of orange groves in Louisiana. I thus been 

 found by him at Pattersonville, Saint Mary's Parish ; at Woodville, 50 



* This parasite is evidently au Aphdinus, but ike only specimen in Mr. Hubbard's 

 collection is too poor for specilic determination. C. ,V. 11. 



