Elaphidion paraldlwm — Bores into the twigs of the oak, apple, and 

 probably other fruit trees. 



Clytvs {OyUene)robinise — Bores into the trunk of the common locust. 



Clytu8 ((!!//cnhiiis) 8peeio8U8 — Bores into the trunk of the sugar-maple. 



Clytvs caprse — Bores into the trunk of the ash. 



Saperca Candida — Bores into the lower trunk of the apple tree. 



Saperda tridentata — Burrows under the bark of the trunk of the elm 

 tree. 



Mgeria rxitiosa — Bores into the root of the peach. 



/Egeria tipulifornm — Bores into the stems of the currant bushes. 



.i:\jrrin \ pyri — Larva live under the bark of the pear tree. 



Mgeria acerni — Larva burrow under bark of soft maple. 



Mgeria curcvbitse — Bores into the stem of the squash vine. 



Mgeria rtthi — Bores into the lower part of the cane and in the root 

 of tbe raspberry and blackberry plants. 



Tremex columba — Bores into the trunk of the elm, oak, sycamore and 

 occasionally tbe apple tree. 



Hyletus robinise — Bores into the stem of the common locust, red oak 

 and Balm of Gilead. 



ROCKY MOUNTAIN LOCUST. 



[nquiries in reference to the Rocky Mountain locust, or destructive 

 grasshopper of the West, having been received from various individ- 

 uals in this State, Iowa and Nebraska, and also accounts of grasshop- 

 pers living in swarms in Illinois, I replied substantial^ as follows in 

 The Inter Oram of October 9, 1S7"> : 



Your note inclosing a letter from D. B. P., of Norwood, Mercer County, 

 111., has been received : also the grasshoppers forwarded at the same 

 time. I find in the box five specimens, all in good order, four of which 

 belong to OaloptenvA differentialis (Thomas), a widely different species 

 from that which visited Kansas and Nebraska in such destructive 

 numbers in 1S74. Mr. P. states in his letter that " They 

 have been living over this place since Sunday, August 29." 

 This is something new for this species. I have observed it somewhat 

 closely for several years here and in the West, its range extending to 

 the Rocky Mountains, and although frequently finding it quite nu- 

 merous in limited areas, have never observed it migrating. But the 

 testimony of Mr. 1'. and of Professor Burril, of Champaign, who has 

 carefully examined the living specimens, together with other facts 

 ascertained, appear to settle tbe point that the swarms recently seen 

 living over parts of Illinois were of this species. 



These facts will now probably assist us in explaining some item- of 

 which Mr. Walsh came in possession in 1867, but was then unable to 

 explain, because the statements then made were not accompanied, as 

 they have been in this instance, by specimens o\' the insect referred 

 to. Accounts of great damage being clone by grasshoppers in North- 

 em, Centra] and Southern Illinois were sent to the Prairie Farmer j 

 he also obtained accounts of grasshoppers Hying over portions of 

 Northern Illinois and Southern Wisconsin. As we find tbe C.differ- 

 entialis tins year very abundant at Cairo and in other parts of South- 

 ern Illinois, also in Central and Northern Illinois, and hear of their 



