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‘ 7 
REPORT OF THE ENTOMOLOGIST. 59 
yan STAGES OF GROWTH—DESCRIPTIVE. 
__ The following descriptive matter is from Professor Riley’s Seventh 
Report on the Insects of Missouri, and is fuller and more careful than 
that published elsewhere. It will be noticed that there are three 
larval stages, necessitating two molts before the pupa and three before 
the adult. It will also be noticed that the larve have but two joints 
to the feet, while the adults have three: 
THE EaeG (Plate I, fig. 2), Average length 0.03 inch, elongate-oval, the diameter 
- scarcely one-fifth the length. The top squarely docked and surmounted with four 
small rounded tubercles near the center. Color when newly laid, pale and whitish, 
and translucent, acquiring with age an amber color, and finally showing the red 
parts of the embryo, and especially the eyes toward the tubernacled end. The size 
cama somewhat after deposition, and will sometimes reach near 0.04 inch in 
ength. 
LARVAL STAGES.—The newly-hatched larva is pale yellow, with simply an orange 
stain on the middle of the three larger abdominal joints. The form scarcely differs 
_ from that of the mature bug, being but slightly more elongate; but the tarsi have 
but two joints (Fig. 4, d), and the head is relatively broader and more rounded, 
_ while the joints of body are sub-equal, the prothoracic joint being but slightly 
longer than any of the rest. The red color soon pervades the whole body, except 
the first two abdominal joints, which remains yellowish, and the members, which 
remain pale. After the first molt the red is quite bright vermilion, contrasting 
strongly with the pale band across the middle of the body; the prothoracic joint is 
relatively longer, and the metathoracic relatively shorter (Plate I, fig. 3). The head 
_ and prothorax are dusky and coriaceous, and two broad marks on mesothorax, two 
smaller ones on metathorax, two on the fourth and fifth abdominal sutures, and 
_ one at tip of abdomen are generally visible, but sometimes obsolete: the third and 
fourth joints of antennz are dusky, but the legs still pale. After the second molt 
the head and thorax are quite dusky and the abdomen duller red, but the pale 
transverse band is still distinct ; the wing-pads become apparent, the members are 
_ more dusky, there is a dark red shade on the fourth and fifth abdominal joint, and, 
pial, a distinct circular dusky spot covering the last three joints (Plate I, 
g. 4). 
Pupa (Plate I, fig. 5).—In the pupa the coriaceous parts are brown-black; the 
wing-pads extend almost across the two pale abdominal joints, which are now 
- more dingy, while the general color of the abdomen is dingy gray; the body above 
is slightly pubescent, the members are colored as in the mature bug, the three- 
_ jointed tarsus is foreshadowed, and the dark horny spots at tip of abdomen, both 
. above and below, are larger. 
Imaao (Plate I, fig. 6).—The perfect insect has been well described, and I will 
append the original descriptions : 
*“Lygeeus Leucopterus (Chinch-bug). Blackish, hemelytra white, with a black 
spot. 
“Tnhabits Virginia, 
“Body long, blackish, with numerous hairs. Antenne, ‘rather short hairs; 
second joint yellowish, longer than the third; ultimate joint rather longer than 
the second, thickest; thorax tinged cinereous before, with the basal edge piceous : 
_ hemelytra white, with a blackish oval spot on the lateral middle; rostrum and 
feet honey-yellow ; thighs a little dilated. 
“Length less than three-twentieths of an inch. 
**T took a single specimen on the eastern shore of Virginia. , 
“ “* The whiteness of the hemelytra, in which is a blackish spot strongly contrasted, 
__ distinguishes this species readily.” (Say, Am. Entomology, I, p. 329). 
The above description originally appeared in 1832, in a pamphlet entitled ‘‘ De- 
_ scriptions of new species of Heteropterous Hemiptera of N. A.” 
**Length, 1} lines, of three-twentieths of an inch. Body black, clothed with a 
_ very fine grayish down, not distinctly visible to the naked eye; basal joint of the 
antennz honey-yellow; second joint of the same tipped with black; third and 
* fourth joints black; beak brown; wings and wing-cases white ; the latter are black 
at their insertion, and have near the middle two short, irregular black lines and a 
conspicuous black marginal spot; legs dark honey-yellow ; terminal joint of the 
feet and the claws black.” (Dr. William LeBaron, in the Prairie Farmer for Sep- 
tember, 1850, Vol. X, pp. 280, 281, where the name of Riyparochromus devastator 
is proposed for it). 
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