248 Ins, 
RHYNCHOTA. 
xiii. pp. 269 & 270. Nervous system described ; Mark & Riley, Psyche, 
ii. pp. 201-207, 225 & 226. Its occurrence in Italy ; Nature, xix. 
pp. 375 & 400, Bull. Ent. Ital. xi. pp. 129^-133. 
New genera and species : — 
Melanoxanthus, Buckton, Mon. Brit. Aph. ii. p. 21. Allied to Rhopa- 
losiphum. Type, Aphis salicis, Linn. 
Pterocomma, id. 1. c. p. 142. Intermediate between Aphis, Hyalo- 
pterus, and Callipterus. Type, P. pilosa, sp. n., 1. c. p. 143, pi. Ixxxiii., 
London. 
Cryptosiphum, id. 1. c. p. 144. Rostrum moderate, wings short, rounded, 
veined like Aphis ; cornicles and tail absent or indistinct. Type, C. arte- 
misice (? Pass.), sp. n., 1. c. p. 145, pi. Ixxxiv., Brandon. 
Brachycolus, id. 1. c.‘p. 146. Differs from Hyalopterus in the short 
limbs, and from Cryptosiphum in the moderately long tail. Type, Aphis 
stellarice, Hardy (= A. hold, Hardy), redescribed and figured, 1. c. p. 147, 
pi. Ixxv. figs. 1-3. 
Lachnns longistigma, Monell, “ Valley Naturalist,’’ June, 1878, St. 
Louis. 
Schizoneura americana, Riley, Bull. U. S. Geol. Surv. v. p. 4, pi. i. 
figs. 1 a-h, Iowa. 
Pemphigus retro-flexus, Courchet, Rev. Montp. viii., Montpellier; P. 
populi-monilis, Colorado, Kansas, p. 13, pi. ii. figs. 3 a-g, populi-trans- 
versus, Texas, p. 15, pi, ii. figs. 5 a-d, populi-ramidorum, Colorado, 
aceri-folii, p. 16, & fraodni-folii, St. Louis, p. 17, Riley, 1. c. 
Siphonophora hipontis, Passerini, Bull. Ent. Ital. xi. p. 45, Tortona, on 
Inula hifrons; S. achyrantes, p. 18, calendulella, tulipce, p. 19, tilice, lirio- 
dendri, and var. rufa, cratmgx, p. 20, sonchella and calenduloe, p. 21, Monell, 
Bull. U. S. Geol. Surv. v., St. Louis. 
Aphis edentula, figs. 1-3, p. 39, pedicularis, figs. 4 & 5, p. 41, pi. xlviii., 
penidllata, p. 51, pi. li. figs. 5 & 6, cucurhitce, p. 56, pi. liv. figs. 1 & 2, 
lentiginis, p. 59, pi. Iv. figs. 1 & 2, petasidis[-tis'], p. 69, pi. Iviii. figs. 1 & 2, 
aucuparice, p. 76, pi. lx. figs. 3-5, acetoscB (? = molluginis, Koch), p. 80, 
pi. Ixii. figs. 5-7, instabilis, p. 94, pi. Ixviii. figs. 1-5, hellis, p. 98, pi. Ixix. 
his, figs. 1, 2, & 4, opima, p. 101, pi. Ixxi., Buckton, I, c., Britain ; A. can- 
dicans and phelipcecB, Bologna, on Orobanche ramosa, and A . tormentillce, 
Italy, on Tormentilla erecta, Passerini, 1. c. pp. 46-48 ; A. lutescens, 
calendulicola, p. 23, hyperici, p. 25, lonicerce and helianthi, p. 26, Monell, 
1. c., St. Louis. 
Hyalopterus dilineatus\bi-'] and melanocephalus, Buckton, 1. c. pp. 113 & 
116, pis. Ixxvi. & Ixxvii., Britain. 
Rhopalosiphum salicis, St. Louis, and rhois, United States, Monell, 1. c. 
pp. 26 & 27. 
Callipterus ulmifolii. United States, walshi, asclepiadis, p. 29, discolor, 
punctata, hyalinus, betulcecolens[betuli-'\, p. 30, carycc, and C. (?) quercicola, 
St. Louis, p. 31 ; id. 1. c. 
Chcetophorus betulce, Buckton (? = granulatus, Koch), 1. c. p. 139, 
pi. Ixxxii. figs. 1 & 2, Walthamstow, on birch ; C. viminalis. United States, 
p. 31, smithice and quercicola, Illinois, p. 32, Monell, 1. c. 
