494. 

 DONACIA TYPH^. 



Order Coleoptera. Fam. Crioceridae. 



Type of the Genus, Donacia crassipes Fab. 

 DoNAciA Fab., Gyl., Hoppe, Panz., Lat., Curt. — Leptura Linn., Mars. 

 Antenncs inserted nearly in front of the face, approximating, 

 slightly thickened towards the apex, longer than the head and 

 thorax, pubescent, 11 -jointed, basal joint the stoutest and ovate, 

 2nd the shortest, the remainder more or less clavate, 3rd as long 

 as the 1st, 4th longer, 5th generally the longest, the remainder 

 sometimes slightly decreasing in length, apical joint a little acu- 

 minated at the apex (6). 

 Lah'um semicircular, ciliated in front (1). 

 Mandibles semilunate, very acute at the apex, one finely serrated 

 on the inside (2*), the other bifid, having 2 long sharp teeth at 

 the apex, and a small one on the inside, below which is a mem- 

 branous ciliated margin (2). 



Maxillee short and broad, terminated by an orbicular articulated 

 lobe, very pilose at the apex and internally, a large ovate lobe 

 on the inside also densely ciliated. Palpi longer than the maxil- 

 lary, triarticulate, basal joint stout, 2nd smaller, both rhomboidal, 

 3rd elongated compressed and glandular at the apex (3). 

 Mentum broader than the lip, horny at the base. Labium sub- 

 cordate, large and pilose at the apex, with a fleshy margin be- 

 neath. Palpi triarticulate, inserted near the middle of the lip, 

 2 first joints subovate, the 2nd producing a few long bristles ex- 

 ternally, 3rd as long as the other two, conical compressed and 

 having a gland at the apex (4). 

 Head narrower than the thorax, suborbicular : eyes small but prominent, 

 lateral and globose. Thorax cylindric-quadrate, the angles more or 

 less acute. Elytra twice as broad as the thorax, linear, attenuated 

 and sometimes trigonate at the apex, which is emarginate. Wings 

 ample. Thighs clavate, posterior the longest, stout and denticulated 

 beneath in some, especially the males. Tibiae, posterior crooked, fre- 

 quently serrated inside towards the apex : tarsi short, broad and 4- 

 jointed, 2 basal joints obtrigonate, Zrd bilobed, 4th clavate : claws 

 curved acute (5 f, hind leg) . 

 Obs. The dissections are from D. cincta Germ. 



Typh^ Ahr.—Gyll.—Curt. Guide, Gen. 417. 20. 



Green, more or less brassy, clothed with fine grey silky pu- 

 bescence, excepting the thorax and elytra : antennae black, base 

 of the joints ferruginous, 5th joint the longest ; head with a short 

 deep channel between the eyes, very thickly and minutely punc- 

 tured, as well as the thorax which is oblong- quadrate, the sides 

 notched, with a depressed line down the back ; scutellum black : 

 elytra very finely striated transversely, with numerous lines of 

 deep punctures confused at the base and apex, the external angle 

 being slightly produced ; a broad space down the back is gene- 

 rally rosy with an irregular stripe of blue on each side the su- 

 ture : legs aeneous black, posterior thighs not stouter than the 

 others and without teeth, pale ferruginous at the base, the tips 

 and base and sometimes the inside of the tibiae of the same colour. 

 In the Author s arid other Cabinets. 



