TRICHOPTERYGlDiE. 
259 
iiograph of the Trichopterygia. London : 1872, sm. 4to, 
pp. 189, 31 pis. [reviewed in Ent. M. M. viii. p. 277, and 
Nouv. et Faits, p. cxvii] . 
The author places the TricJwpterygia between the Philhydrida (or Hydra- 
depJiaga) and Brachelytra, commencing with Nossidium and finishing with 
Ptinella ; hut no affinities between any of the members of the group and 
Gyrimts or Cercyon are suggested. He recog-nizes 21 genera and 149 species, 
for the reception of which two families are proposed, viz. Ptiliadce, in which 
the elytra are not truncate, and TrichopterygidcB, in which the elytra are trun- 
cate. In discussing the general anatomy of the group, the following obser- 
vations occur : — the mandibles are ribbed transversely on the outer edge, and 
are capable of being tm-ned inwai'ds towards the gullet, so that the ribbed 
portions crush the food inter se. Gillmeister has figured the elongate curved 
process of the stipes as the mandible, at the articulation with which is always 
a large transparent membranous plate, used in clearing a space for the above- 
mentioned inverted use of the mandibles * (a somewhat analogous formation 
occms in Dinopsis). The maxiUary palpi are 4-jointed. Du Val's account 
of the buccal organs is the most correct, Erichson's being hopelessly obscure, 
and Gillmeister's founded on mutilated objects. There are no biarticulate 
setae at the apex of the ligula. The peculiar structure of the wing is retained 
throughout all the genera except Nossidium and Motschidshiiim. The 
" knobbed bristle " said to exist between the claws is apparently mythical. 
The larvae of Trichopter-yx, Pteryx, and Ptinella (all that are known) resemble 
each other closely. 
The following synonymic and other obser\'ations occur, amongst others : — 
Ptenidimn formicetorum, Ktz., is adopted for myrmecopliilum, Mots., neo 
AUib. 5 P. apicale, Gillm., Er., terminale, Hald.,=et;awescews, Msh. ; P. loivi- 
gatuniy WoU., nec Gillm., is named hrucid, p. 82 ; P. nitidum^ Bris., nec Heer, 
is named hrisoidi, ibid,; Acteella, Mots., =Actidium, Mots.; A. transversale, 
^r., = boudieri, AWih. ; A.Jiliforme, Avih€,mediterranemn, Mots. j=coarctatu?ny 
Hal.; Ptilium canadense, Lee, = collani (errore hollani), Mann. ; Micrns, Matth., 
nec Mots., is named Smicrus, p. 110 ; Trichopteryx silhermanni, Wencker,= 
littoralis, Thorns., nec Mots., = variolosumy Muls. ; T. ehevrieri, Matth., nec 
Allib., is renamed poweri^ p. 118; T. insidaris, Maim., =sitkensis, Mots.; T. 
convexa, Matth., = convexiuscida, Mots. ; T. cursitans, Matth., nec Nietn., = 
fuscipennis, Hald. (1848), " notnen prius usitatum " [but not so appearing in 
the dated list of all prior described species given by the author], is named 
dohrni, p. 144 ; Astatopteryx laticolUs, Perris, nec Mann., is named perrisi, 
p. 154 [but laticollis, Mann., is a recognized Trichopteryx, and Perris's insect 
is the tj^Q on which that author founded his genus, recognized as such by 
Matthews, and differing toto coelo from Trichopteryx] ; Pteryx dimidiata 
Mots., = balteatum, Lee; Ptinella proteus, Matth., =Zm6a to, Heer, $,=^e5- 
tacea, Heer; P. punctipenne, Fairm,, =denticolle, Fairm., 5 5 P' nigrivittis, 
J^ec. ,=pallidtda. Mots., ^ , = qiiercus, Lee; P. ratisbonensis, G(i\\xa..,=aptera, 
Guer., 5; P. gracilis, G\\\m., = angustula, Gillm., 5j Myrrnicotrichis sttbvit- 
tata,Mot9.,?=cdquatorialis, Mots., $, 
* C. Lindemann, Bull. Mosc. xliv. 2, Se'ances, p. 12, also records this struc- 
ture of the mandibles. 
