' Nervosus, Mg. 



THE CHIRONOMID.E. 195 



(aa). Thorax not striped. 



xvii. ? black, shiny, stout. Legs " 

 stout, tawny ; fore tibiae and tips of 

 tarsi, femora and remaining tibiae 

 brown. First, second, third veins 

 and transverse veinlets brown. 

 Length, 3 Un. 

 Pygiiuvus, V. d. Wulp, is also found in England. 



Genus. — Chtnio, Hal.* 



This is a small genus, containing, as far as we know, only two 

 European species : 



The proboscis and palpi are obsolete ; the thorax large and the 

 abdomen small, with large hypopygium, about the same size or even 

 larger than the abdomen. Antennre are ii-jointed, the third and 

 eleventh joints being elongated, the intervening joints being small. 

 The head is round and the thorax passes over it like a hood. Four 

 veins only present in the wings, the second and third being forked ; 

 there are no transverse veinlets. (PI. iv., fig. 7.) 



C. Marinus, Hal. 



As I have not seen this myseif, I append Haliday's description of 

 it, the male only apparently being known : 



" Dusky ferruginous. Head rounded, inflected to the praesternum. 

 Mouth obsolete. Eyes rounded ; distant above, approximate be- 

 neath, the antennae. Antennas, legs, wings, and halteres dingy 

 white. Antennae i i-jointed, shorter than the thorax ; the short 

 joints rather dusky ; the basal joints sub-globose ; the terminal ovate, 

 the third and last elongate, elliptical. Thorax projecting over the 

 head ; scutellum and sides of the thorax before the wings pale 

 yellowish ; mesonotum divided by two parallel sutures, with an 

 elevated line down the middle, and a depression before the convex, 

 semicircular scutellum ; metathorax very short ; mesosternum gib- 

 bous. Wings adiaphanous, naked, except the pubescent margin ; 

 praibrachial vein (second longitudinal vein) bifurcated about its 

 middle, embracing the apex with its branches ; pobrachial (third) 

 forked near the margin with the hinder branch (sub-anal) recurved, 

 ending at the posterior margin ; radial cubital (first longitudinal vein) 

 fainter between the prasbrachial and the costa, ending at about the 

 middle of the latter ; anal vein (fourth) simple. Abdomen dusky, 

 * Nat. Hist. Review, ii. Proc, 62, pi. 2, fig. 4, 1855, Haliday. 



