. Coleoptera : general introduction and Cicindelidae and Paussidae. Fig. 42.—Wing of MotschuUMum. (After Matthews.) 1900 by the late Mr. P. B. Mason of Burton-on-Trent, Stafford-shire ; of these Ghampionella, Dimorphella, and Mikado areparticularly noticeable. [Family 19. HYDEOSCAPHIDiE.] Minute aquatic insects (from 1-2 mm. in length), elongate-conicalin shape, ivith the abdomen produced and narrow, the producedportion being about as long as the elytra ; antennce short, eight-jointed(the apex of the long eighth joint being, according to Matthews,divided into two minute joints), subclaviform;
. Coleoptera : general introduction and Cicindelidae and Paussidae. Fig. 42.—Wing of MotschuUMum. (After Matthews.) 1900 by the late Mr. P. B. Mason of Burton-on-Trent, Stafford-shire ; of these Ghampionella, Dimorphella, and Mikado areparticularly noticeable. [Family 19. HYDEOSCAPHIDiE.] Minute aquatic insects (from 1-2 mm. in length), elongate-conicalin shape, ivith the abdomen produced and narrow, the producedportion being about as long as the elytra ; antennce short, eight-jointed(the apex of the long eighth joint being, according to Matthews,divided into two minute joints), subclaviform; ivings broad, deeplyfringed with hairs ; tarsi 88 INTRODUCTION. These extraordinary little insects, of which three or four speciesare known from Spain and North America, are really Trtcho-PTEKYGiDiE modified for an aquatic existence. They appear to befound in running water. [Family 20. SPH^] Minute hemispherical insects; head large, sessile, with the eyeslarge ; antenna; short, W-jointed, with the club well marl:ed, obscurely^-jointed; maxilla: feeble, bilobed ; ivings large and ample, deeplyfringed ivith cilia ; episterna of the metasternum long and narrow ;all the coxa: transverse; the posterior pair very much enlarged,prominent, contiguous, extending to the sides of the body and to thefourth ventral segment. The , through their ciliated wings, are evidentlyallied to the Trichopterygldj2, but apart from this, they presentno special affinity to any particular group, as pointed out byMr. Matthews, who took a great interest in this small family, anddescribed four out of the six known species. In one or twopoints
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1912
