486 



Bentinck: Glossary 



formed either by a fusion of frons, clypeus, and 



labrum or sometimes by frons and clypeus alone. 

 Nasus. In some Tipulidae, a noselike point at the 



apex of the rostrum. 

 Natatory. Pertaining to, adapted for, or characterized 



by swimming. 

 Nervures. The veinlike structures supporting the wing; 



veins. 

 Notogaean. Of or pertaining to a proposed zoological 



realm including the Australian, Polynesian, and 



Hawaiian regions. 

 Notum. The dorsal sclerotization of a body segment, 



especially in the thorax. 

 Nubilous. Cloudy, diffuse, indistinct. 



Obconic. In the form of a reversed cone, with the 



apex as a base and the base apical. 

 Obsolete. Almost or entirely absent; indistinct; not 



fully developed. 

 Occipital. Of or pertaining to the occiput or back part 



of the head. 

 Ocellate. Provided with ocelli or simple eyes; having 



round spots ringed with another color. 

 Omphalium. In the hemipterous family Gerridae, the 



elevated median gland opening in the metasternum 



posteriorly. 

 Onisciform. Shaped like a sow bug or wood louse of 



the genus Oniscus. 

 Operculum. In mayflies, one of the pairs of abdominal 



gills (usually the first, second or fourth) which has 



become enlarged and thickened so as to form a 



protective cover for the other gills. 

 Operculate. Having opercula, q.v.; elytroid. 



Palletes. The disclike structure composed of three 



tarsal segments on the anterior legs of male 



Dytiscidae. 

 Palpiger. A sclerite bearing a palpus; specifically, 



the palpus-bearing structure of the labial mentum. 

 Parafacies. In Diptera, the part of the face between 



the facial ridges and the eyes. 

 Paraglossae. The lateral terminal lobes of the labium. 

 Palmately. Shaped like a palm, or a hand with the 



fingers extended. 

 Pectinate. Comblike; applied to structures such as 



antennae with even processes like the teeth of a 



comb. 

 Pedicellate. Supported by a pedicel or stalk; stalked 



or on a stalk or stem. 

 Penis. In mayflies, one of a pair of tubular processes 



of the ninth abdominal segment arising dorsal to 



the styliger plate and carrying the opening of the 



sperm ducts at their tips. 

 Perfoliate. Divided into leaflike plates; applied to 



antennae with disclike expansions connected by a 



stalk passing nearly through their centers. 

 Petiolate. Having a petiole, q.v.; stalked; placed 



upon a stem. 

 Petiole. A stem or stalk; the slender segment between 



the thorax and abdomen in many Hymenoptera and 



certain Diptera. 

 Piceous. Pitchy black; black with a reddish tinge. 



Pile. Thick, fine, short, erect hair giving a surface 



appearance like velvet. 

 Pinnately. Having branches or parts arranged on each 



side of a central axis. 

 Planate. See figure 4:41. 

 Plastron. In aquatic insects, an air film on the surface 



of the body, by means of which the insect respires 



when submerged. 

 Plica. A fold or wrinkle; a longitudinal pleat of the 



wing. 

 Porrect. Extending forward horizontally. 

 Postocular. Behind the eyes. 

 Postscutellum. In Diptera the convex area immediately 



behind or beneath the scutellum. 

 Prescutal lobe. In Diptera, a callus situated anterior 



to the wing base, one on each side of the meso- 



notum. 

 Proclinate. Directed forward; applied to bristles. 

 Produced. Drawn out; prolonged. 

 Prognathous. Having the frontal surface of the cranium 



horizontal with the mouth parts directed forward. 

 Proleg. A fleshy appendage of the thorax or abdomen 



of some immature insects, usually bearing numerous 



small hooks or crotchets, and functioning as a leg. 

 Prostyle. In some beetle larvae, one of a pair of 



lateral, worm-shaped appendages of the anal seg- 

 ment. 

 Proximal. Situated toward the point of origin or attach- 

 ment, as of an appendage. 

 Pruinose. Covered with a frostlike bloom or powdery 



secretion. 

 Pseudocelli. Sense organs, resembling ocelli in 



appearance, distributed over the body in certain 



Collembola and Protura. 

 Pseudomola. A structure resembling the mola or 



roughened grinding surface near the base of the 



mesal surface of a mandible. 

 Pterostigma. A thickened opaque spot on the costal 



margin of a wing near its middle or at the end of 



the radius. 

 Pubescence. Short, fine, soft, erect hair or down. 

 Punctulate. With small punctures or pitlike depres- 

 sions. 

 Pupillate. With an eyelike center. 

 Pygidium. In Curculionidae, the last visible dorsal 



sclerite of the abdomen. 

 Pyriform. Pear-shaped. 



Radial planate. See figure 4:41. 



Radial space. The space or cell immediately behind 



the radial vein. 

 Raptorial. Adapted for seizing prey; predaceous. 

 Rastrate. Covered with nearly parallel, longitudinal 



scratches. 

 Reclinate. Directed backward. 

 Reticulate. Covered with a network of lines. 

 Retinaculum. In Coleoptera, the middle toothlike 



process of the larval mandible. 

 Retuse. Having an obtuse or rounded apex with a 



shallow notch. 

 Revolute. Spirally rolled backward. 

 Riparian. Of, pertaining to, or frequenting rivers or 



their shores. 



