114

British Species of Cadclis-flies.

not dilated in the female ; anterior tibiae with two moderatelylong and equal apical spurs ; intermediate and posterior tibiae eachwith two pairs of long unequal spurs. Abdomen short. The secondjoint of the inferior appendices in the male is simple. In thefemale the abdomen ends in a long compressed ovipositor.

Larva unknown, frequenting swiftly-running streams.

This genus I have named after Mr. P. C. Wormald, one of thefew Entomologists who have paid attention to the Trichoplera. Itis allied to Philopolamus, but differs in the form of the palpi andin the neuration of the wings, as was pointed out by Dr. Hagenin the Stettin “ Entomologische Zeilung” for 1860, p. 279. Thespecies are small and unicolorous,

1. JVormaldia occipitalis, Pictet(PI. VII. fig. 7, neuration and maxillary palpus; PI. XIII.fig. 23, app.)

Hydropsyche occipitalis, Piet. (*) IJecherch. p. 211, 14, pi. 19,fig. 8 (1834); Philopolamus occipitalis, Hag. (*) Stett. Zeit.1860, p. 279 ; M‘Lach. Ent. Ann. 1863, p. 135 ; Aphelocheirasubaurata, Steph. (*') Ill. p. 180, 2 (1S36) ; Philopolamus longi-pennis, Brauer, Neurop. Aust. p. 39 (1857); P. Ramhurii,Kol. Gen. et Spec. Trichop. pt. 2, p. 207, 1 (1859) ; Ilydro-psyche brcvicornis, Piet. Recherch. p. 211, 13, pi. 19, fig. 7(1834)?

Antennae brown, annulated with yellow. Head fuscous, clothedwith yellowish hairs. Palpi fuscous. Mesothorax shining brown.Anterior wings yellowish-grey, the veins towards the base clothedwith long yellow hairs. Posterior wings subhyaline, smoky-grey.Legs oclneous. Abdomen greyish-fuscous above, paler beneath.In the male the upper margin of the last abdominal segment isrounded off, slightly excised ; app. sup. small, blackish ; app.inf. long, testaceous, the apical joint rather broad and obtuse atthe tip; penis-cover (or penis?) somewhat pointed, yellowish.The ovipositor of the female is long and yellowish.

Expanse of fore-wings 6—7 lines.

Not an uncommon species about swiftly-running streams,especially in the North and West of England. Stephens givesthe metropolitan district as a locality, but I have not seen recentspecimens from thence. It decidedly prefers mountainous dis-tricts, appearing in summer and autumn.