168 PEOCEEDINGS OF SOCIETIES. 



Generum Synopsis. 

 Ungues 



pectinati 1. Helorus. 



integrae: Antenna? 



prope epistoma insertae 2. Ismarus. 



ab epistoraate distantes : Palpi maxillares 

 5-articulati mala longiores : Labiales 



3-articulati 3. Belita. 



2-articulati 4. Diapria. 



3-articulati mala breviores 5. Platymisciids. 



obsoleti 6. Laboiips. 



Genus 1. HELORUS Latreille. 



Antennae 15-articulatae, filiformes, porrectae, in utroque sexu. Alae 

 anticae areolis etiam mediis et stigmate. Ungues pectinati. 



Palpi maxillares 5-articulati, labiales 3-articulati. Mandibula utraque intus biden- 

 tata. Labrum angustissimum, lineare. Alarum anticarum areola radialis 1 , cubitales 

 2, discales 2, brachiales 2. Metathorax obtusus. Abdomen apice incurvum. 



1 . coruscus : niger, antennis subtus pedibusque testaceis, femoribus 

 posticis infuscatis, scutello medio laevigata, pterostigmate subtri- 

 gono: mas. 



Sequente gracilior ; petiolus longior, subcylindriacus ; prothoracis latera media laevi- 

 gata ; pterostigma latius. Vena recurrens disci posterior apice subarcuata. 



Not nearly so common in England as the following species. I have 

 found both species in "Westphalia also. 



2. anomalipes Pz. : niger, tibiis tarsisque anticis vel omnibus tes- 

 taceis, scutello ubique punctato, pterostigmate lanceolato : m. f. 



Abdominis petiolus basi incrassatus. Vena recurrens disci posterior recta obliquata. 

 Vertex punctatus. Scutellum rud6 punctatum, 'margine crenatum. 



Sufficiently common in some parts of England and Ireland. 



A third species, larger than either of the two preceding, taken near 

 Aix-la-Chapelle, is in the collection of Mr. A. Eorster of that city. If 

 Jurine's figure is correct, we have represented in it a fourth European 

 species of this genus, — H. ater : totus niger, areola cubitali interiore 

 semi-divisa. 



Genus 2. ISMAEUS Hal. 



Antennae prope epistoma insertae, filiformes, scapo vix frontis alti- 

 tudine; maris 14-articulatae, articulo tertio integro; feminae 15-articu- 

 latae. Mandibula bicuspis. Alae anticae areola radiali parva et brachiali 

 unica, Mesonoti scutum aequatum. 



Labrum transversum. Palpi labiales 3-articulatL Metathorax brevissimus. Ab- 

 domen apice incurvum. 



Subgenus 1. Ismaeijs. 

 Palpi maxillares 4-articulati. Petiolus longior quam latior. 

 1. dorsiger Curtis B. E. (CSnetus) 380,—neesii YoTster—Belyta 

 anomala Nees: abdominis petiolo oblongo, apico attenuate, segmenti 



