NATURAL HISTORY SOCIETY OF GLASGOW. 9 



A A. Body form of A, but marginal nervure received immediately 

 before the apex of 2d sub-marginal cellule, almost touching the 2d sub- 

 marginal nervure. 



3. Phaenusa ulmi. 



Fenusa ulmi, Sundivall, Forliandl. red de Skandin. Naturforsk. 

 in Christiania (1847), 240, 241; Healy, Eiit. v., 297; Kalten- 

 bach, Pflanzenfeinde, 539. F. intermedia, Thoms. (I.e.), 18G, 3. 



Black, shining. Antennae short, stout, covered with a stiff 

 pile; two first joints together equal in length to the third, 

 which is twice longer than the fourth, the remaining joints to 

 the eighth shorter, 9th joint conical, longer than the preceding. 

 Head a little narrower than the thorax, scarcely pubescent, 

 shining, smooth, sutures moderately distinct: labrum and man- 

 dibles piceous; palpi dark testaceous. Tliorax shining, smooth, 

 not pubescent; tegulae black. Abdomen short, thick, smooth, 

 semi- truncate at apex; blotch large, sheaths of saw exserted. 

 Feet: femora, with coxae and trochanters, black; apical half of 

 the two anterior femora, knees, tibiae and tarsi, dark testaceous. 

 Wings faintly smoky ; first marginal cellule a little smaller than 

 the second ; second sub-marginal cellule more than double the 

 width of the base at the apex, angled where it receives the 

 recurrent nervure. 



Male similar, but with thicker and longer antennae, the joints 

 from the fourth being perceptibly thicker than the basal ones. 

 Length 1^ lines. 



Var. Four posterior tibiae and tarsi black. 



Ulmi is not unlike the two preceding species, but has the 

 frontal sutures less distinct, the wings a good deal clearer, and 

 otherwise is easily separated by the alar cell-structure. 



Common in England and Scotland. 



The larva is white, with the head pale brown, darker at the 

 sides ; mouth reddish brown ; feet encircled with brown. Be- 

 neath, on the second segment, is a black oblong plate, sometimes 

 with a dot on each side ; there is a small black central dot on 

 each of the following segments, but the dots are often absent 

 on the posterior segments. When full-fed it is yellowish-white. 

 Length 5 lines. 



It mines the leaves of Ulmus campestris and U. montana, and 

 several larvae live in one leaf. According to Mr Healy there is 

 but one brood in the year, viz., in May and June ; but I have 



