HOMOPTERA. CERCOPIDZ — PSYLLID. 117 
TYPHLOCYBA Germ. Evrreryx Curt. 30 sp. C. Ulmi Linn. Curtis, 640. 
Ocelli 0; hypostoma oblong-subtrigonate ; fore wings indistinctly nerved; pos- 
terior tibia with a double row of spines. 
PENTHIMIA Germ. G. 1425 St. Cat. 1 sp. sanguinicollis ¥. Pz. 61. 18. 
Wing-covers folding over each other at the tip; hypostoma flat, transverse ; ocelli 
on the crown of the head; hind tibizw with two rows of spines. 
AGALLIA Curt. Byruoscorus p. H. Sch. 4 sp. C. venosa Ahr. 
Face ovate, trigonate ; head above forming a narrow lunule; ocelli in the forehead 
prothorax narrower than the head ; wings very much deflexed, apical nervures 
reticulated ; posterior tibiz spined externally. 
IDIOCERUS Lewis. Byrnoscorus p. Burm. 5 sp. I. stigmaticalis Lew. 
Head broader than the thorax ; face subturbinate ; ocelli facial ; fore-wings mem- 
branous, overlapping at the tips; seta of antenne ¢ clavate. Curt. 733. 
BATRACOMORPHUS Lewis. ‘Trans. Ent. Soe. vol. i. 1 sp. 2B. irroratus L. 
Depressed ; head nearly as wide as the thorax ; anterior margin very convex ; ocelli 
near superior margin of face; wing-covers slightly deflexed; intermed. tibiz 
spined. Trans. Ent. Soc. vol. i. pl. 7. f 5. 
MACROPSIS Lewis A. S.G. Peptorsis Burm. ...sp. C. virescens Fab. 
Head as wide as the thorax, anterior margin convex, posterior concave; face sub- 
rhomboidal, flat ; apex truncate; ocelli facial; antenne placed in excavations 
beneath the eyes. Trans. Ent. Soe. vol. i. pl. 7. f. 3. 
ONCOPSIS Burm. Macroprsis B. Lewis. ... sp.  C. flavicollis L. 
Differs from the last in having the face tumid, and the prothorax transverse- 
ovate, notched behind. Trans. Ent. Soc. vol. i. pl. 7. f. 4. 
IASSUS Fab. Byrnoscorus p. Germ. 1 sp. J. Lanio L. Curtis, 636. 
Head very broad and short, base concave ; ocelli placed on the forehead between 
the eyes; thorax transyerse-ovate ; face broader than long; eclypeus oblong; 
ovipositor recurved. 
Obs. The genera Bythoscopus and Lassus have been much confused. Bur- 
meister thus distributes them into subgenera in his Genera Insectorum : — 
Bythoscopus. 1 A. Bythoscopus (Flata varia Fab.). 1 B. Idiocerus 
Lewis. 
2 A. Oncopsis (Macropsis B. Lewis). 2 B. Pediopsis 
(Macropsis A. Lewis). 
Tassus. 1 A. Iassus [N.G. Curtis’s Guide] (I. atomarius, cruen- 
tatus Germar, §c.) 1 B. Athysanus (C. argentatus, 
histrionicus, &c.). 2 A. Deltocephalus (I. pulicaris 
Fall, §c.). 2 B, Platymetopius (I. vittatus Fab., &c.). 
Sect. II. Drwera Westw. (Phytophthires Burm.) 
Family 1. (or 4.) PSVYLLIDA. (Faux-Pucerons Réaumur. 
Psyllodes Burm.) 
PSYLLA Geoff. Cuermes Linn. 27 sp. C. Pyri Linn. Curtis, 565. 
Head moderately notched in front ; antenne slender; wing-covers membranous. 
LIVILLA Curt. —— 1sp. L. Ulicis C. Curtis, 625. 
Head very deeply cleft in front; antenne long, slender; wing-covers convex, 
coriaceous. 
LIVIA Laér. Driraruta Iilig. 1 sp. Ps. Iuncorum Latr. Curtis, 492. 
Head strongly bifid; antenna short, dilated at base; wing-covers deflexed, co- 
riaceous. 
I3 
