35 



and the median ridge is considerably elevated ; in migratorius the 

 posterior tibiae are livid ; in danicus, reddish ; in migratorius the 

 sexes are of about equal sizes ; in danicus the female is about twice 

 as large as the male. Before leaving locusts, I will again repeat 

 that the correct names to use for them are as follows : — 

 Pachytylus migratorius (L.). 

 Pachytylus danicus (L.). 

 Acridium cegyptium, L. 

 Schistocerca peregrin a ( 1 i v . ) . 



The first two belong to the GEdipodidae, and so to use the name 

 CEdipoda for them, though wrong, is not so painfully inaccurate as it is 

 when applied to either of the last two, which belong to the Acridiidae, 

 a totally distinct family : to speak of CEdipoda cegyptiaca is as bad as 

 to speak of Pieris io, or Vanessa machaon. 



(Edipoda ccerulescens (L.) is the " langoute" of the French, the blue 

 winged grasshopper which is so well known to those who collect on 

 the Continent. Podisma pedes tre (L.), alias Pezotettix pedestris, has 

 never occurred in England, in spite of the statements of the early 

 authors. Neither has Psophus stridulus (L.). 



Of the curious family, the Tettigidae, in which the pronotum is 

 produced to an extraordinary degree over the abdomen, in the exotics 

 twisted in many curious and bizarre forms, we have two species. 

 Both are fairly common on dry places, and are our only Acridiodea 

 that hibernate. Their ova are deposited in the spring to be hatched 

 in the late summer. 



The young grow, hibernate, and reappear in the following spring ; 

 they may be often taken among moss and leaves on a fine winter's 

 day. 



Of the extensive and numerous section the Locustodea, we have in 

 England but ten species. Phaneptera falcata (Scop.) has occurred 

 but once, and cannot be fairly included. Leptophes punctatissima 

 (Bosc.) is common enough, though not often seen ; it seems to 

 frequent high trees, for it is more often found after a wind. Meco- 

 tiema varium (Fabr.) is little known, though quite a common insect. 

 Xiphidium dorsale (Latr.) is rare, and seems only to occur in a few 

 marshes; X.fuscum (Fabr.), the commoner species on the Continent, 

 is erroneously said to have been taken in Britain. Locusta viridis- 

 sima (L.)is well known to you, but Thamotrizon cinereus (L.) possibly 

 less so. Still, it is quite a common creature, though somewhat 

 hard to capture, for it sits and chirps in thick prickly brambles, that 

 defy and torment the anxious collector. Platycleis grisea (Fabr.) so 

 abundant on the Continent, is found with us only on the coast, 

 especially on sand and chalk. P. brachyptera (L.) is somewhat local, 

 but occurs on heaths and commons throughout the country. A prize 

 that goes begging for a capture is P. rxselii (Hagenb.). I know of 

 five records of its capture in England, two of which were in the 

 neighbourhood of Heme Bay. Decticus verruvicorus (L.), the Wart- 

 biter, should be taken more frequently. It has been captured com- 



