494 
Observations on the various Insects 
bottle, and on the 5th of July I found a small black fly hatched 
(fig. 31). The plants of corn, whether of wheat or barley, I could 
not ascertain, which I received on the 23rd of June had the outer 
blades green (fig. 32, s), the inner one yellow or brown (fig.^); 
on pulling this blade it drew out, leaving the base beliind, which 
was completely eaten through (fig. 33, ?<) : the stem which 1 had 
drawn out was of a yellow colour, and about half an inch of it was 
eaten, and dry (fig. 34, v), and just within I detected a small yel- 
low, shining maggot (fig. id). Although it has no feet, it crawls 
well even upon glass ; the head is attenuated, with two minute 
black hooks extending into the thoracic segments, through which 
they are visible : I counted twelve segments, the apical one being 
rounded, with two minute tubercles (fig. x, magnified). On the 
29th of June, one or more of the maggots had changed to brown 
pupae in the stem, occupying the same place as the larvse had 
done (fig. y) ; and on the 20th of July I found two little black 
flics, the Oscinis vastator (fig. 31), dead in the box, and precisely 
the same as that bred on the 5th of July, with the emply cocoons 
also. 
Owing to a variation in the nervures of the wings, and other 
minor differences, this species and many others* have been sepa- 
rated from Cldorops, and are raised to a Genus bearing the name 
of OsciMs; and as our species does not agree with any of the 
others published in the works of Meigen or Macquart, and I have 
no opportunity of ascertaining if it be the one described by Olivier, 
I am compelled to give it a name, which alludes to its destructive 
nature. 
13. O. vastator. Curt. (fig. 31); Tephritis hordei, Oliv.l 
Shining greenish black : antenna) attached to the forehead, short, 
compressed, drooping, and approximating at the base ; four-jointed, 
basal joint cup-shaped, second semi-orbicular, on the outside of 
which, near the base, is inserted the third joint, which is exceed- 
ingly minute, fourth a short pubescent bristle ; lip and palpi con- 
cealed in a cavity beneatli the head, which is bristly, with a large 
shining triangular space on the crown, on which are placed the 
three minute ocelli in a triangle ; face smooth, and not concave as 
in Chlo7-oj)s ; eyes remote in both sexes, lateral and oval, brown 
after death, but probably green when alive ; thorax as broad as 
the head, globose quadrate, with a scarcely visible ochreous pile, 
forming veiy indistinct lines in perfect specimens, and an impres- 
sion on the disc; scutellum semi-ovate, terminated by two bristles, 
and finely rugose; abdomen short, not so broad as the thorax, 
rather depressed, ovate conic and five-jointod; wings decumbent 
in repose, and extending considerably beyond the tad, transparent 
* Vide Cvntis"s Guide, genus 134.'), species 28 to CI. 
