13060 271 



Aberfoyle. On the 14th of the same month we visited the locality 

 together, and again found the species, but the weather was unfavoura- 

 ble, and the take restricted accordingly, including but few males. 



In recording this species as T. reuteri^ some explanations are 

 necessary. T. reuteri was described from three $ r^ (one from 

 Ostrogothia, Sweden, and one each from Helsingfors and Aland, 

 Finland). It was subsequently found at Esbo in the latter country, 

 and Sahlberg gave me a $ from that place. This c^, although rubbed, 

 agrees with McLachlan's description as far as its condition allows 

 comparison. He says the insect deceptively resembles some $ examples 

 of (Ecetis furva. The present insect is very different, and in appear- 

 ance superficially resembles a small form of T. conspersa. The 

 appendages are, however, similar to those of reuteri, although the 

 inferior appendages in the Scottish insect are apparently less closely 

 approximated when seen from beneath than in the Finnish reuteri. 

 The apex of the penis is also said to be slightly upturned in reuteri, 

 while in our examples it is generally rather upturned ; but the 

 character is not stable. 



For a proper understanding of the three forms, conspersa and 

 reuteri from Finland, and the Scottish insect now referred to the latter 

 species, a full set of preparations of the genitalia of each is desirable, 

 but in the meantime the requisite material for this is lacking. In 

 certain groups of Leptoceridce little or no importance can be attached 

 to coloration. 



13, Blackford Eoad, Edinburgh: 

 Octoler 26th, 1906. 



Lathrohium elongatum, L., v. nigrum, var. nov. — When studying the sexual 

 characters of Lathrobium hrunnipes, F., a short time ago I came across two 

 specimens in my series with the 7th ventral segment of the abdomen very 

 differently formed than in the rest. On examining these more carefully they 

 proved to be a black form of Lathrohium elovgatum, L., differing, of course, in 

 many respects from L. hrunni/pes. One has uniformly black elytra with the apical 

 half of the suture very narrowly and obscurely pitchy ; in the other the apical third 

 of the elytra shows a very slight trace of pitchy colour. One is labelled Slapton 

 Ley ; April, 1902," the other " South Devon ; April, 1902," but the latter may 

 also have been taken at Slapton Ley. Mr. Eeys tells me that the dark form of 

 Lionyclms quadrillum, Duft., having no trace of the yellow markings on the elytra 

 occurs fairly commonly at Slapton, but that it appears to be very rare elsewhere. 

 I have thought it best to give the Lathrohium a varietal name to warn collectors 

 from mistaking it for L. hrunnipes as I did.— Noeman H. Joy, Bradfield, near 

 Reading : November 5th, 1906. 



