142 [June, 



((?) being impuiictate and shining towards its base, the left ( 9 ) pu"'-''"!'^"-' ^^^ 

 over. Tlic apices of these two lobes arc separated by a triangular incision. That 

 on the right side is widely pale and niombranous externally ; that on the left seems 

 to be of one consistency throughout, and to have an a])ical fimbria of dense hairs 

 which is wanting in the other. 



In extracting the genitalia 1 found vestiges of, as I believe, three concealed J 

 segments, viz. : — ■ 



(1) An apical dorsal segment, apparently identical in form with that of the 

 concealed (8th) dorsal in an ordinary ^ of the species. 



(2) Tlie right half oidy of a 7tli ventral, so distorted ami stunted as to be 

 hardly recognisable, except by careful comparison with the corresponding part in an 

 ordinary male. 



(3) The right half only of an 8th ventral. This (except that it is a half only) 

 seems normally constructed, and, I think, can be identified without doubt or diffi- 

 culty. The antenufB are both $ , twelve jointed, and with black scapes. The legs 

 also, except the right intermediate one, seem to be ? , and the posterior pair are 

 certainly such, with well developed scopffi of normal form and colour. 



Thus, summing what has been said moi-e briefly, the ,^ characters in this speci- 

 men are confined to the /eft side in the head and genitalia, and to the rigid side in 

 the thorax, legs and abdominal segments. In the genitalia and in the head (except 

 as to the antenna?) male and female elements seem pretty equally balanced, and the 

 same may perhaps be said of the abdomen if we take into account both external 

 and internal characters. But in the thorax and legs the ? element very greatly 

 preponderates. And wherever the same character appears on both sides of the 

 specimen alike (e. g., the antennae, the scopsB, and the black pilosity on certain seg- 

 ments) that character is always ? • 



The insect when taken seemed healthy and vigorous. It was visiting 

 flowers of some labiate plant, if I remember right, Nepeta glecliomu, 

 and its flight was just that of an ordinary female. Its curious parti- 

 coloured face caught my eye, otherwise I should have let it pass as a 

 female, for the other characters were too inconspicuous to attract 

 attention as it flew past me. 



Brunswick, Woking : 



March, 1901. 



Note oil Athalia spinarum. — The frequency and distribution of AtJialia spinarum 

 is of 80 great an economic interest that all who can throw light on the subject should 

 contribute. Specimens were so abundant on the coast of Suffolk in July, 1859, that 

 they were mistaken for shinnncring heat ((/. Ent. Ann., I860, p. 91). Mr. W. H. 

 Tuck took a number at Southwold in September, 1899 {cf. Trans. Norf. Nat. Soc, 

 vii, p. 14). I have collected eight years in Suffolk and did not meet with it till 

 1900, when it occurred singly on Angelica si/Ivestrls flowers in Tuddenham Fen and 

 at Lackford Bridge in August.— Claude Morley, Ipswich : Ilay Isf, 1901. 



