358 REPORT ON ZOOLOGY, MDCCCXL1V. 



Holland, two species from which, C. rJiodophilus and cyanopterus, are figured. 

 The author suspects Xiphocera ruricola, Burni., may be a third. Both the 

 sexes of Acridium meestum, Serv., from the Cape, are given also. (Ibid, 

 pi. GO.) 



Eieber (Ent. Monogr. p. 134, pi. 10, f. 17-19) gives a third German 

 species of Teftix, under the name schrankii, distinguished from T. bipunctata 

 principally by the sharp upper edge of the hind thighs running without 

 interruption to the knee, while in the latter it terminates abruptly before 

 this. Farther, he has made a distinct group, Tettigides, in the family 

 Acridii, out of the genus Tettix, Latr., Amorphus, Serv., Plagiocephalus, 

 Ficb., Chorophyttum, Serv., and Batrachotetrix, Burm., characterized by the 

 fore rim of the fore breast (propectus) enlarged like a collar, the fore chine 

 (pronotum) elongated behind, and the want of the ernpodium. The new 

 genus Plagioceplidus is founded on a new species discovered by Heifer, in 

 the East Indies, P. pacliymerus, nearly related to Tettix and Chorophylluin, 

 and distinguished by the broad short head with receding forehead, the high 

 arched and sharp-ridged (fastigiated) fore chine, as long as the abdomen, the 

 hind thighs very broad, the keel of the middle shanks flounced and scalloped. 



Bohemann has laid before the Stockholm Academy (Ofvers. Forhaudl., 

 1844, p. 405 ; Hornschuch's Scand. Beitr. i, \(rl) an account of the appear- 

 ance of a swarm of Locusts, Gr. miyratorius. They were observed in 

 Ostrogothia, where they perched on the tallest oaks and ash trees, as if it 

 had been a field of clover, but disappeared in a few hours. In Wikbolaud 

 they made their appearance also, greedily attacking the grass and foliage, 

 and not letting even the stacks of corn alone- 



PERLABI^. Newman has discovered gills in Pteronarcys regulis in the 

 perfect state. (Ann. Nat. Hist, xiii, p. 21 ; Ann. Sc. Nat. i, 183; Froriep's 

 N. Notiz. xxx, 179.) 



This is the first instance of such organs being found in the perfect insect. 

 They are tuft-shaped (branchiae fasciculares), composed of eight pairs of 

 gill-pouches, from which a number of long setaceous filaments spring on 

 the outside, forming collectively a thick tuft on each of the pouches. 

 These are placed (as Pictet has described them in the larvae of Nemura 

 cinerea) above the true breathing-holes or spiracles ; to be specific, the first 

 pair at the underside of the fore chest (prothorax), in the membrane between 

 the head and the fore breastplate (prostcrnum) ; the second and third, con- 

 sisting of two tufts each, between the fore and mid, the fourth and fifth 

 between the mid and hind breastplate, behind the middle pair of hips ; the 

 sixth in the junction of the thorax and abdomen, behind the hind hips ; the 

 seventh and eighth pairs, each consisting of a single tuft, more towards the 

 sides, the seventh on the first, the eighth on the second segment of the 

 abdomen. The latter two pairs have the same position as the apparently 



