1889.] 335 



This species much resembles A. frontalis, but may be known by 

 its shorter and stouter moniliform antennae, and evidently stronger 

 sculpture, as well as by the straighter and narrower appendages of 

 the third ventral segment in the male. 



A. melanostoma, Costa (monilicornis, Muls., s.g., Nasipa, Emery). 

 Very like the preceding, but less elongate, and distinguished by having the 

 thorax not or scarcely strigose, and the sculpture of the elytra very obsolete, as well 

 as by the fact that the third ventral segment of the abdomen in the male bears no 

 lacinise, being simple as in the female ; the antennae are rather stout and moniliform, 

 with the second joint small, and joints 5 — 10 subtransverse ; the thorax, moreover, 

 is shorter than in A. rufilabris, and has the posterior angles less acute and more 

 nearly right angles ; the formation of the antennas and the absence of ventral ap- 

 pendages in the male will separate it from A. frontalis; the colour of the legs is 

 somewhat variable ; the male may be known by having the fifth ventral segment 

 split to base, and the anterior tarsi dilated. Length, 2\ — 3 mm. 



On flowers, &c. ; one specimen in Dr. Power's collection, taken 

 at Darenth Wood on June 3rd, 1860. Many years ago Mr. Crotch 

 expressed it as his opinion that it would occur in Britain ; it appears 

 to be found in most of the districts of France, and is rare, according 

 to Thomson, in Norway and Sweden. It is very likely not uncommon 

 in the south of Britain, and may have been passed over partly through 

 its likeness to A. frontalis, and partly owing to the difficulty of determi- 

 nation occasioned by the absence of the appendages in the male ; the 

 split 5th segment of the abdomen is, however, a good character. Mr. 

 Crotch considers Thomson's characters of the nearly smooth thorax 

 and obsoletely strigose elytra to require further confirmation, and adds, 

 as an additional character to separate it from A. rufilabris (derived 

 apparently from Mulsant, Longipedes, p. 88), the fact that the first 

 joint of the anterior tarsi is equal to the second, whereas, in the last- 

 named species it is much shorter. 



A. Gteoffkoyi, Mull. 

 (fasciata, Forst., humeralis, F., biguttata, B,ossi). 



Black, with a large bright yellow patch at each shoulder, which varies in size, 

 and sometimes covers the greater part of the elytra ; occasionally there is a small 

 spot also behind the middle of each elytron ; the pubescence is more scanty than is 

 usually the case in the species belonging to the genus ; antennae long, somewhat 

 thickened towards apex, not moniliform, black, with the base yellow, mouth and 

 palpi yellow ; thorax transverse, very finely sculptured ; elytra very finely and 

 closely strigose transversely ; legs variable, dark or more or less testaceous. 



Length, 2^ — 3 mm. 



Male without appendages at the apex of the third ventral segment of the ab- 

 domen, and with the fourth segment produced in the middle behind, and the fifth 

 deeply cleft ; anterior tarsi moderately dilated. 



