DUBLIN UNIVERSITY ZOOLOGICAL AND BOTANICAL ASSOCIATION. 173 



Genus 5. PLATYMISCHUS. 



Palpi maxillares 3-articulati, mala breviores; labiales obsoleti. Man- 

 dibula intra apicem unidentata. Antennae in fronte porrecta insertae, 

 ab epistomate distantes; maris articulis 14, tertio emarginato; feminae 

 1 2-articulata3. Alee fere exareolatae, vel nulla3. 



Subgenus 1. Platymischus Wwd. 



Ocelli nulli, nee alas. Antennas maris scapo dilatato fornicato. Mala 

 brevis dilatata. Mandibulae adstrictae, postice edentulae. Protboracis 

 et mesothoracis segmenta penitus coalita. Scutellum basi efoveolatum. 

 Abdominis petiolus incrassatus. Metatarsus anticus dilatatus, in mare 

 fortius, cujus etiam intermedins aliquantum. 



One British species, Platymischus dilatatus Wwd., common upon 

 seaweeds drying on the shore. 



Subgenus 2. Artiboltjs n. — Chlidonia spp. H.-SchaefTer. 



Ocelli tres. Mala atque ligula elongata membranaceae. Mandibulae 

 denexae rostriform.es, margine postico denticulato. Yena subcostalis 

 exiens in lineolam stigmaticalem appendiculatam. 



One species, Diapria brachialis Nees, — Chlidonia uncinata Herrich- 

 SchaefTer. Kesembles a Belita in its general aspect ; and the base of 

 the second segment of the abdomen, in the female, is gibbous beneath, 

 as in some species of that genus. The form of the mandibles, on the 

 other hand, is more like that of the Diaprice which constitute the sub- 

 genus Galesus. 



Genus 6. LABOLIPS n. 



Antennae (feminae) in fronte porrecta insertae, 1 2-articulatae. Mala 

 atque ligula retractae. Palpi maxillares obsoleti; labiales minuti ex- 

 articulati. Alae fere aveniae. 



Ocelli tres. Mandibula intra apicem unidentata. Antennae scapo elongato, flagello 

 perfoliate Abdominis segmentum secundum basi excavatum. 



1. Labolips innijpta n. Plate X. 



Length 2 lines, antennae l£, spread of wings 2|. 



Black, shining, abdomen pitchy, with ferruginous tip. Antenna? dusky-ferruginous, with 

 blackish scape. Legs and squamulaa ferruginous, coxae darker. Wings with a smoky 

 tinge. Head subglobose, a little longer than broad, from the bilobed protuberance of the front, 

 which bears the antennae. Eyes rather small, protuberant, hairy. Ocelli 3 in a triangle, 

 Parts of the mouth ferruginous, not prominent, the palpi not visible externally. Mandibulae 

 forcipate, stout, bidentate at the tip. Labrum transverse, the margin rounded. Maxillae 

 oblong, the tip rounded without a distinct mala or any trace of palpus. Labium stout, 

 obconic, a little retuse at the tip ; with a pair of palpi, distant at their insertion, and very 

 short, consisting of a single obovate joint, crowned with two fine hairs. Peristoma pro- 

 duced into a curved spine-like process at each side. Antennae as long as the head and 

 thorax nearly ; the scape cylindric, composing about i of the entire length ; the second 

 and third joints obovate ; the following ones oblate, perfoliate, and gradually increasing 

 in both diameters towards the end ; the last joint as long as the preceding two together, 

 rounded at the tip. Thorax oblong, depressed, and rather flat on the back ; prothorax 

 coarsely punctured, attenuated into a neck ; mesothorax smooth above ; the scutum with 



