Cyphonina.] SERRICORNIA. 119 
a*, Antenna long, with the third joint 
as broad as second, and the remaining 
joints elongate, cylindrical . . . Microcara, Thoms. 
b*, Antenne comparatively short, with the 
third joint narrower than second, and the 
remaining joints shorter, obconical . . CypHon, Payk. 
B. Antenne serrate in male, subfiliform in female PRIONOCYPHON, Ledt. 
2. Mandibles short and broad, and blunt at apex; 
punctuation very fine and indistinct . . HyprocrpHon, Redt. 
. Posterior legs formed for leaping, the femora being 
errant thickened ; tibial spurs long. . Scrrtgs, Jil. 
IJ. Prosternum distinct before and between the cones 
penultimate joint of tarsi not lobed; elytra with deep 
Cirepe mii, Fo po A GB 6 Bio Ss oo A SND CaHe 
HELODES, Laireille. 
Fourteen species belonging to this genus are found in Europe, of 
which two occur in Britain; they may be easily known by the very 
small transverse third joint of the antenne, which are long and slender ; 
the eyes are very large, the thorax almost semicircular, and the inter- 
mediate coxe contiguous. 
The larva of Cyphon debe (Helodes minuta) is described and figured by 
Chapuis et Candéze (Cat. des Larves des Coléopterés, p. 153, pl. v. fig. 5); it is 
5-6 mm. in length, of a greyish-black colour, rather short and broad, somewhat 
onisciform ; the head is much narrower than the prothorax, which is about as long 
as the meso- and metathorax together ; the anal segment is considerably narrower 
than the preceding ; the antenne are very long, being almost as long as a third of 
the body, and the legs are short and, unless stretched out, not visible from above ; 
the sides of the body are thickly fringed with fine short cilia; these larve live on 
aquatic plants, and in the early part of June change into pupe, from which the 
perfect insect emerges in about fifteen days. 
JT. Head and thorax reddish-testaceous . . ve ictee ee Ele MENU AAS ele 
Il. Head and thorax black, the latter with margins more 
or less broadly testaceous ..... . . . . H. Mar@inata, Ff. 
HI. minuta, L. (pallida, F.). Oblong-ovate, moderately convex, 
clothed with pale pubescence, testaceous, with the eyes, suture, and 
apex of elytra, and the abdomen, black; the colour is somewhat 
variable, the elytra being sometimes unicolorous with the apex narrowly 
black, and sometimes dark with the shoulders only lighter; head small, 
eyes large ; antennz long, stouter in male than in female, dark with the 
base light; thorax finely punctured, almost semicircular; scutellum 
large, distinctly punctured ; elytra broader than thorax, elongate oval, 
thickly and plainly punctured, with distinct traces of raised lines ; legs 
reddish-testaceous, posterior femora plainly punctured. L. 83-43} mm. 
Male with the antenne stouter than in female, and furnished with 
erect pale pubescence ; last ventral segment of abdomen emarginate at 
apex, and with a deep semicircular impression, the sides of which are 
fringed with greyish hairs. 
By beating sallow, alder, &e. ; also by sweeping herbage; usually, but not always, 
