APPLE' TWIGS, LOCUST — THE LAKVA AND FLY. 47 



whether this Insect takes any nourishment after it arrives at its 

 perfect state, Mr. Weter informs me that an orchard of young 

 trees upon his farm had the smootli barli of the tjunlc and llffibs 

 punctured profusely, and that the sap exuded copiously from 

 these punctures; and Mr. Robertson makes the same observation. 



It however is only those twigs and limbs which are badly 

 wounded by the female in depositing her eggs, which perish and 

 fall to the ground. But in this way extensive injury is often 

 done. Mr. Thomas W. Morris, speaks of having seen the tops of 

 the forest trees in Pennsylvania and Ohio, for upwards of a hun- 

 dred miles, appearing as if scorched by fire, a month after this 

 locust had left them. (Horticulturi>t, vol. ii, p. 17.) Many of 

 the Avounded limbs, however, survive the injury which they 

 receive. 



The EGGS of the locust are 0.08 long and 0.06 in diameter. They are of an oval 

 form, rounded at each end, and of a white color. Statements are very coifiicting as 

 to the length of time that elapses after the eggs are deposited before they hatch, 

 some saying it is but a fortnight, others that it is six or seven weeks. 



The young labva, when it hatches from the egg is but 0.06 in length, and of a 

 yellowish-white color, clothed with fine hairs, its eyes and the claws of its fore legs 

 being tinged with red. It has six legs, of which the anterior pair is much the 

 largest, resembling the claws of the lobster, and armed on the under side with 

 strong spines. It is quite active and lively in its motions, 'and drops itself from the 

 limb to the ground, in which it immediately buries itself by means of its fore legs, 

 which are admirably adapted for digging. 



The PEREECT INSECT varies from an inch and a half to nearly an inch and thyee- 

 quarters in length, to the tips of its closed wings, and when these are spread, they 

 measure from two inches and a half to three and a quarter across. It is of a coal 

 black color, marked with bright orange jellow as follows — upon the transverse and 

 oblique raised lines at the base of the thorax, a large spot on each side of the thorax 

 forward of the wings, the whole under side of the abdomen in the males, but only 

 the posterior margins of the segments in the females, the veins of the wings, the beak 

 and the legs. Varieties occur having the feet black, the shanks marked with black 

 towards their bases, this color either occupying the whole outer side, or merely form- 

 ing a stripe on their anterior side. The anterior thighs are also black along their 

 inner edge, including the spines which arise from this edge. The four hind thighs 

 often have a black stripe along their posterior sides. The angular edges of the ante- 

 rior hips are also black. There is commonly a small dull white spot in the groove on 

 the middle of (he head, behind the small simple eyes. The veins of the wings are 

 margined each side by a slender black line; they become dusky at their tips, and the 

 oblique vein, parallel with the apical margin, is black, and is margined with smoky. 



