20 LAMELLICOENIA— GEOTRUPIDAE. 



Blue or bine-black ; antennae and palpi black. Promi- 

 nence on clypeus feeble ; elytra with very fine, indistinct 

 striae, interstices either smooth or transversely scratched. 

 Spot of hairs on anterior femora black. Male with at least 

 eight teeth on under-side of anterior tibiae. L. 5| — 7 1. 

 Common. G. vernalis, Lin. 



2. Thorax visibly punctured at sides only. 



Similar to G. vernalis but much more brilliant, smooth 

 and sliiny, narrower in proportion to length, abdomen im- 

 punctate in middle beneath, posterior angles of thorax less 

 obtuse and rounded. Male with five or six teeth on under- 

 side of anterior tibiae. L. 5|— 7 1. Common. 



G. pyi'enaeus, Charp. 



TBOGIDAE. 



Club of antennae with plates free and nearly ecpial in 

 size. Ligula membranous, hidden by mentum ; lobes of 

 maxillae horny, inner one armed with a simple hook in 

 middle and another (usually three-toothed) at apex. Sides 

 and base of thorax thickly fringed with bristles. Forehead 

 and thorax uneven. Trox, Fab. 



Trox, 



A, Length 3| — 4 lines. 



a. Elytra with sliallow, feebly punctured striae, alter- 

 nate interstices somewhat raised and bearing a row of 

 roundish, smooth elevations, on each of which is a tuft 

 of longer yellow bristles ; the other interstices granular, 

 with short bristles. 



Dull gray-black. Narrower than T. sahvlosus, with thorax 

 rather broader, flatter and rather less closely punctured. 

 Front of forehead angular in middle. Eare. 



T. hisjyidus, Laich. 



b. Elytra with broad, shallow, strongly punctured striae, 

 alternate interstices a little raised and bearing tufts of 

 very short gray-yellow bristles ; the other interstices 

 with smaller tufts of similar bristles. 



Dull gray-black. Front of forehead rounded. Mode- 

 rately common. T. sahulosus, Lin. 



B, Length 2f— 3 lines. 



