1348 COLEOPTERA 



The structure of the aiitennse ditfereiitiates this genus from any 

 other known to me ; their condition is not, I beHeve, the result of 

 accident or mutilation, as they present exactly the same appearance 

 in the two specimens before me. I fail to detect more than three 

 joints in each tarsus ; the two basal are distinctly marked off from 

 the third. Owing to the small size of the insect I have been unable 

 to determine the exact structure of the trophii. The genus, I think, 

 should be located in the Lathridiidse. 



2362. D. formic sephila, n.s. Shining, smoky-black, spar- 

 ingly clothed with fine, decumbent, yellowish hairs ; legs fuscous. 



Head finely and distantly punctured, a little contracted behind 

 the eyes. TJiorux widest near the middle, the lateral margins with 

 some small denticles, its punctuation rather fine and distant on the 

 disc ; near the base, at the middle, there is a large foveiform de- 

 pression. Eli/tra truncate at base, a little wider there than the 

 thorax, their sides slightly rounded ; each elytron has a fine sutural 

 stria, and six or eight series of fine punctures. 



Underside blackish, sparsely pubescent, indistinctly sculptured, 

 the coxae castaneous. 



Length, f ; breadth, nearly ^ line. 



Ashburton. Mr. W. W. Smith kindly sent me two specimens 

 which he discovered in the nests of Tetramoriuin nitidum. A pretty 

 A-phi^s found in the same ants' nest has, I am informed, been named 

 by Mr. Maskell. 



Group -B YRRHID^ . 



Morychus (Gen., p. 244). 



2363. M. nigralis, '^-s- Convex, broad, oviform, nearly 

 glabrous, bearing only some minute yellowish hairs, which are most 

 easily seen from behind; the legs and first antennal joint red, tarsi 

 and palpi yellow, remaining joints of the antennae fulvescent. 



Head rather finely but distinctly, though not closely, punctured ; 

 the middle almost smooth ; lahrum only moderately carinate at the 

 base, punctate and pubescent ; eyes moderately convex. Thorax 

 twice as broad as long, narrowed towards the front, the sides nearly 

 straight and finely margined, all the angles acute, base subtruncate, 

 its sculpture like that of the head. Scutelliim minute or invisible. 

 Elytra nearly smooth behind, their punctation less distinct than 

 that of the thorax. Legs clothed with slender brassy setae ; tibim 

 externally arcuate, the anterior not distinctly grooved for the tarsi, 

 these latter pubescent, their third joint with an elongate membrane. 



Underside piceous, shining, clothed with tine yellow hairs, more 

 or less finely and distantly punctured. The prosternal process 

 plane, not extending beyond the coxae, its apex received into the 

 curved notch of the short mesosternum. Middle coxae widely 

 separated, with a broadly-curved suture between them. 



AntcmuR with elongate first joint, second not half the bulk of the 

 first ; 3-5 slender, third largest ; 6-10 become shorter and broader, 



