Set/chcllea and Ranf/ooti. 5 



Matthews also states (Mon. pp. 109, 115) tliat the liind 

 wings are either absent or small and narrow in S-iricoderus 

 and Anisomeristes, but in those specimens of S. (^A.) seycheU 

 iensis, sp. n., which T have dissected they are much longer 

 than the elytra. For the rest Matthews describes them as 

 " ample" in his diat^noses of all the other genera except six, 

 in which he either states that he had not examined them or 

 does not mention them at all. But in the case of some 

 genera examination of larger numbers both of species and 

 individuals is j)robably required. 



I'echnique. — In fixing the generic position of species T 

 Ifave never relied on general appearance alone, but have in 

 all cases made balsam-preparations of antennte and mouth- 

 parts for examination under the compound microscope. - 

 These preparations are mounted between two cover-slips, one 

 of which is attached to a cardboard framework ; the thinness 

 of the glass then allows of both sides of the object being 

 viewed through a high-power objective, while the cardboard 

 framework admits of the preparations being pinned beside 

 tlie insects. Balsam-preparations appear almost essential in 

 dealing with Corylophidae, and are indispensable in describing 

 any new genus. 



Measxn-ements of length have been made with a calibrated 

 micrometer-eyepiece. Drawings made with the aid of a 

 drawing- apparatus. 



For comparison I have used the British Museum Collection, 

 which, including Matthews's Collection and his balsam- 

 preparations, is fairly complete up to the date of his ' Mono- 

 graph ' (1899). Descriptions of older forms not included in 

 the jMonograph, and of all species and genera described since, 

 have been consulted. 



LiTERATUEE. — Mattlicws^s ' Monograph of Corylophidse 

 and Sphseriidse ' appeared in 1899, after its author's decease. 

 A number of species unknown to him were not included in 

 liis manuscript, but the editor of the Monograph refers to 

 these on pp. 19-21 and p. 217. The Monograph may there- 

 tore be taken as a fairly complete enumeration of the species 

 up to and including 1899. 



The following is a list of the subsequent literature, compiled 

 from the ' Zoological Record.' the nature of ejich work being 

 briefly indicated. Though a catalogue of the family has 

 recently appeared, this list may also be of some use : — 



1900. Casey. Journ. New York Eiit. Soc. viii. pp. 60-75, review of 

 N. Amer. forms, describing several new genera and species: 

 Bathuna, g. u., Gronevus, g. u., Eutrilia, g. n. near Ort/ioj)eruii, 

 Molamba, g. u. near Sacium. 



