Rapisma, McLachlan, 1866

M'Lachlan, Robert, 1867, IX. A new Genus of Hemerobidae, and new Genus of Perlidae., Transactions of the Entomological Society of London ser 3 5, pp. 353-354 : 353

Rapisma , n. g.

Caput sub prothorace occultimi; oculi globosi, parvi; antennae breves, intus sub-serratae, pilosae; palpi parvi. Thorax et abdomen valde robusti; prothorace late transverso. Pedes breves, pilosi. l ae amplae: anticae sub-coriaceae, pilosae, elongatae, latae, sub-acutae, margine apicali obliquo; spatium costale basi latissimuni, venulis transversalibus numerosis, furcatis, areolis numerosis (ad basin seriebus 3- 5 disposais) irregularibus; sub-costa a radio separata, spatio sub-costali venulis transversalibus numerosis instructor sector primus radio parallelus, sectores caeteros emittens; venulae gradatae per-numerosae, membranam in cellulis parvis dividentes: posticae anticis breviores, sub-hyalinae; spatium costale an­ gustimi; venae fere ut in anticis.

Type.— Hemerobius viridipennis, Walker, Cat. Neurop. Brit. Mus. pt. 2, p. 276, 1; from the East Indies.

A very remarkable genus of Hemerobidae, on account of its robust body, large size and subcoriaceous anterior wings. t bears some resemblance to Rhone (incorrectly placed by New­ man and Walker in the Sialidae ), but differs in the breadth of the basal portion of the costal area, in the absence of a recurrent veinlet, in the details of neuration, and in the head, which is so much retracted under the prothorax that the front alone is visible; it is probable that the living insect has the power of extending the head, but in dead examples it is so greatly concealed, that but for the antennae and eyes, it would be scarcely seen at all.