14 Mr. R. M‘Lachlan’s Monograph of the 
streak runs from the base to near the apex, terminating at the 
pale spot in the sixth apical cell. Legs testaceous; anterior 
femora and the apices of the tarsal joints fuscous. Abdomen 
brownish above, more ochreous beneath. In the male the ter- 
minal abdominal segment is fringed with long reddish hairs ; 
app. sup. long, cylindrical, curved inwards and downwards, with 
thickened apices and with a short triangular tooth at the base; 
app. inf. large, hollow, truncated at the extremity and lying close 
together, the margins turned inwards and toothed; ventral lamina 
broad, apex produced, obtusely rounded. In the female the 
lateral valves are acute at the apices. 
Expanse of fore-wings, ¢ 21—24 lin.; © 25—26 lin. 
Larva dull pale reddish-white. Head with a straight central 
and two lateral interrupted blackish lines, the latter converging 
posteriorly. Pronotum with rather broad blackish margins. 
A common and well-known insect in lake and marshy districts, 
appearing in the summer and autumn months. The largest British 
species of this order. Varies considerably in the intensity of the 
markings, especially in the female. 
2. Phryganea striata, Linné. (PI. IX. fig. 2, app.) 
Phryganea striata, Linn. Faun. Suec. n. 1483 (1761), and 
succeeding works; Hag. (*) Linn. Ent. p. 363; Brauer (*), 
Neurop. Aust. p. 45, fig. 38, App.; P. Becknithi (Leach,. 
MS.), Steph. (*) ll. p. 206, 2 (1837); P. fulvipes, Burm. 
Handb. p. 934, 4 (1839). 
Antenne black, with indistinct paler annulations, most distinct 
towards the apex. Head piceous, clothed with pale brown hairs. 
Palpi fuscous. Prothorax thickly clothed with brown hairs. Me- 
sothorax piceous. Anterior wings cinereous, irrorated with dark 
grey or brown, clouded with darker, a somewhat elongate more 
or less indistinct pale spot in the sixth apical cell, and a small 
round one at the base of the third; veins fuscous. Posterior 
wings wholly brownish-grey, apical veins conspicuously dark 
brown. Legs: anterior and intermediate thighs wholly fuscous, 
tibia and tarsi testaceous, with broad blackish annulations; pos- 
terior legs almost wholly testaceous. In the female the anterior 
wings have a short longitudinal blackish line and shorter blackish 
dashes. Abdomen piceous, paler beneath. In the male the last 
abdominal segment is fringed above with long reddish hairs ; app. 
sup. long, cylindrical, nearly parallel, with a rounded lobe at the 
base, apices thickened and turned slightly upwards and outwards, 
and furnished with long hairs ; app. inf. short, hollow, the margins 
