COLEOPTERA. 473 



illary palpi is merely somewhat larger, and obconical or trian- 

 gular. 



Here the thorax is thick, narrower than the abdomen, and almost 

 orbicular or nearly cordiform. The antennae thicker at the extre- 

 mity and the thighs clavate. 



Lystronichus, Lat.(l) 



There the thorax is depressed, trapezoidal, and its posterior mar- 

 gin is as wide as the abdomen, or hardly narrower. The antennae 

 are filiform or slightly enlarged towards the extremity. In 



Cistela, Fab. 



Or Cistela properly so called, the head projects in the manner of 

 a snout, and the labrum is hardly wider than it is long; most of the 

 joints of the antennae either obconical, triangular, or even serrated; 

 the last is always oblong. The body is ovoid or bordering on an oval. 

 C. ceramboides; Chrysomela ceramboides, L.; Oliv., Col. Ill, 

 54, 1, 4. This species, on account of its antennae, of which the 

 three first joints are shorter than the following ones, and of the 

 serrated form of the latter, might constitute a separate sub- 

 genus. It is five lines in length; black; elytra reddish and 

 striated; thorax almost semicircular. The larva inhabits the 

 tan of old Oaks, where it undergoes its metamorphosis. 



C. siilphurea; Chrysomela sulphurea, L. ; Oliv., lb., I, 6. A 

 more elongated form than that of the ceramboides; length four 

 lines; lemon-yellow; eyes black; elytra striate; antennae simple. 

 Very common on different flowers, those of the Yarrow parti- 

 cularly^). 



Mycetochares, Lat Mycetophila, Gyll. Dej. Cistela, Fab. 



Where the head does not project in the manner of a snout; where 

 the labrum is very short, transversal and linear, and where most of 

 the joints of the antennae are short and nearly turbiniform; the last 

 is ovoid. The body, particularly in the males, is narrow and elon- 

 gated. The maxillae and the labium are soft(3). 



In the others, the penultimate joint of the tarsi is bilobate, and 



(1) Helops equestris, Fab., and some others from Brazil; Helops columbianus, 

 Germ. ; Notoxus helvolus, Dalm. 



(2) See Lat., Gener. Crust, et Insect, II, p. 225; Oliv., Col., lb.; Schcenh., 

 Synon. Insect. I, ii, p. 332, et seq. 



(3) See Gyllenh , Insect. Suec, I, ii, p. 451; Lat., Gener. Crust, et Insect., II, 

 p. 189, Helops burbatus. The name of Mycetophila having been employed by M. 

 Meigen, I have thought it necessary to give a substitute in Mijcetochares, 



Vol. III. 3 K 



