62 PROCEEDINGS OF SOCIETIES. 



Inhabits the banks of rivers, throughout the summer, gliding among the wet 

 gravel, its silky down protecting it from the wet. It takes flight readily, even off 

 the surface of water. The yellowish larvae and pupae are found in the same situ- 

 ation, leaping like the perfect insect. 



Herrich Schseffer, the first describer, has pronounced no opinion on the affinities 

 of this insect. Meyer doubtingly refers it to the Capsidce, influenced probably by 

 the supposed want of ocelli, which both these authors have overlooked. It seems 

 to me better to place it, for the present, with the Lygeida, in a peculiar section, 

 next the Anthocorini, and approaching, perhaps, to the Capsidce, with both of 

 which it has considerable likeness in the wings ; although the dilated and imbricated 

 sutural margin of the hemelytra is peculiar to it, and the rather short, detached 

 proboscis makes some approach to the structure of the Reduvidce. On the whole, 

 Xylocoris is probably the nearest allied native genus. In its habits it most resemble* 

 the Salda, but shuns the light more than they do. 



Ord. DIPTERA. 

 Fam. CHIRONOMHXE. 



Gen. CLUNIO. 

 Proboscis obsolete. 



Antennae 11-articulatse, articulis 3tio et ultimo elongatis. 

 Alae alutaceae, venis longitudinalibus furcatis binis, transversis nullis. 

 Tarsi postici articulo tertio subelongato. 



Clunio marinus, pi. 2, fig. 4. 



Long f , Exp. f lines. Head rounded, dusky ferruginous, concealed under the 

 projecting front of thorax, the mouth inflected to the prosternum. Eyes round, 

 composed of few facets, with some hairs interspersed, approximate on the face. 

 Antennae inserted near the mouth, shorter than the thorax, 11-jointed, whitish, the 

 3rd joint elongated, the others short and more dusky, the last again elongated 

 and thickened, elliptical. Proboscis obsolete, only the lower margin of the head 

 scalloped, the rounded lateral lobes a little hairy at the tip, perhaps representing 

 palpi, and the intermediate divided lobe the labium. Thorax dusky ferruginous, 

 with the scutellum and pleurae yellowish ; oblong, a little compressed ; the mesono- 

 tum tripartite by two impressed parallel longitudinal lines, an elevated line down 

 the middle, ending in the depression before the scutellum ; this convex, semicir- 

 cular; metathorax very short; mesosternum gibbous backwards. Legs rather 

 short, compressed, dingy white, pubescent ; the hind tibiae at the tip, and the hind 

 tarsi ciliated. Fore coxa twisted, the trochanter toothed, and the base of the femur 

 curved. Tibiae blackish at the very base, armed at the tip with a minute black 

 pointed spur. Anterior tarsi with the first joint linear, the following ones short 

 suborbiculate, the last ovate; hind tarsus with the first and third linear, the 

 second oblong, half as long as the third, the fourth short suborbiculate. Un- 

 gues dusky; empodium apparently dilated more than the onychia. Posterior 

 coxae extending backwards under the base of the abdomen. Wings oblong, with 

 the axillary sinus semicircular, and the anal angle strong ; the membrane adiapha- 

 nous, dingy whitish, microscopically stippled, glabrous, only the margin finely 

 pubescent. The veins faint, the first* ending a little before the middle of the costa, the 

 nextf is forked opposite the end of the first, the posterior branch running to the tip, 

 the anterior ending not far before it ; another! runs to the posterior margin, becom- 

 ing forked beyond the middle, with the posterior branch curved, and another very 

 faint simple vein|| accompanies the course of this. Halteres whitish. Abdomen 

 scarcely as long as the thorax, gradually widened behind, of 7 segments, dusky, 

 with a hoary bloom, and a pearly gloss on the posterior segments. Hypopygium 

 as long as the abdomen, and thicker, fusco-ferruginous, with yellowish silky down, 

 and composed of an oblong plate below, rounded at the tip, and a pair of massive 

 compressed lateral arms, with a double ridge beneath, and rounded at the tip, 

 where they are articulated to a smaller compressed piece, dilated at the tip, and 

 truncated (mallet- shaped). The female unknown. 



Radial. f Prabracbial. J Pobrachial. Subanal. B AnaL 



