cide to which Order it belonged, whether to the Trichoptera 

 or Lepldoptera. The mealy texture of the insect might induce 

 an opinion that it was Trichopterous, whilst the contour and 

 neuration of the wings would be in favour of its relation to the 

 Lepidoptera. The absence of a proboscis proves nothing, 

 since it is sometimes wanting in the Bombycidas and other 

 groups. I do not, however, remember any instance amongst 

 the Lepidoptera in which the maxillary palpi are strongly 

 developed, and the labial absent ; yet such appears to be the 

 case in Acentropus: and amongst the Trichoptera, if there 

 be no other instance in which the labial palpi are wanting (but 

 I believe there is), at any rate they are frequently, if not always, 

 smaller than the others, as in Limnephilus (PI. 488.) and Lepto- 

 cerus (PI. 57.). From recent investigations of this Order, the 

 results of which have been published in the 4th volume of the 

 London and Edinburgh Philosophical Magazine, I have ascer- 

 tained that this character is not only general but much stronger 

 in many of the groups than in those above referred to. I lay 

 more stress upon this observation, as it appears to be an im- 

 portant definition in separating the Trichoptera from the Le- 

 pidoptera, since the characters hitherto given do not seem to 

 be sufficient to distinguish them *. 



The generic name of this curious insect alludes to the ab- 

 sence of spurs at the apex of the tibiae ; the species, I have the 

 pleasure of naming after the Rev. W. L. P. Garnons, of Sid- 

 ney Sussex College, Cambridge, who took it at Layer Mur- 

 ney, near Colchester, Essex, and presented it to J. C. Dale, 

 Esq., to whom I am indebted for the opportunity of illustrating 

 this remarkable genus. 1 think I have heard of Dr. Leach 

 taking a specimen in June, in Scotland, and that it has been 

 found also on the Croydon Canal, and in Berkshire. 



The Plant is Myriophyllum verticillaium (Whorled Milfoil); 

 communicated by Professor Henslow, from Bottisham Fen, 

 Cambridgeshire. i. 



* The want of some such cuide, it is to be presumed, has led Mr. New- 

 man to place Psyche (PI. S32,), a genus of Moths, in his Neuropterous 

 Circle, to elucidate the affinity between that Order and the Lepidoptera. 



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