1894.] 155 



"But the larva is easy to distinguish, since it has, like that from the oak, some 

 cavities in the form of excoriations on the median line of the abdomen ; the sides, or 

 expansion around the body, are much broader, more transparent, more folliculated, 

 very wrinkled, and at the point of distinction of this expansion of the body properly 

 so-called, there are also the same kind of excoriations on each segment, eight on each 

 side, and some of them also near the cephalic portion. On each side of the median 

 line, on the first and second abdominal segment, is a blackish spot ; the extremity 

 of the abdomen or anus elongate and brownish. 



" This species, applied always to the under-side of the leaves, is as transparent 

 as that of the oak and the bramble, and it is only by great attention that it can be 

 discovered ; on each side of the prothoracic region beneath is, in the form of a line, 

 a pale secretion from the stigmata, giving to the species the appearance of a small 

 Lecanium." 



Mr. Dale sends six specimens, all exactly alike, which he found 

 on nut-bushes {Corylus avellana), where, he says, it is very abundant. 

 I conclude that it is the A. avellance, Sign., mainly on account of the 

 habitat, but it is of so remarkable a character, and so distinct from all 

 others, that it, at any rate, must be deemed to be special to the tree, 

 and as no other Aleurodes lives thereon, I think there can be no doubt 

 that it is correctly named, and I append a description : — 



Imago, $ ? . Body, antennae, and legs entirely gamboge-yellow ; eyes black, 

 oval, not divided, in the least degree emarginate at the point where the antenna is 

 inserted ; wings somewhat narrow, white, transparent, the marginal nerve yellow, 

 deeply so on the costa and apical curve, paler on the inner side ; on the median 

 nervure a small, undefined, yellow spot just where the nervure is deflected, but no 

 dark spot. Expanse of wings, 2 mm. 



This is the smallest species I know, and is an addition to the 

 British List. 



153, Lewisham Road, S.E. : 

 May 12th, 1894. 



NOTE ON THERMOBIA DOMESTICA, AND ITS OCCURRENCE IN 

 THE UNITED STATES. 



BY A. S. PACKARD, M.D., HON. F.E.S. 



The recent articles on ThermoMa furnorum (Rovelli) by Dr. Sharp 

 and by Mr. McLachlan in the Entomologist's Monthly Magazine for 

 March and April of the present year, lead me to affirm the identity of 

 this insect with Lepisma domestica, described by myself in 1873. When 

 1 first saw Dr. Oudeman's figure of this Thysanuran I felt very sure 

 it was the insect I had in former years so frequently observed. 



I first noticed the insects living in abundance both in winter and 

 in summer in the basement kitchen of my house at Salem, Mass., 



