144 ENTOMOLOGICAL SOCIETY 
the United States fauna is different and the South Floridian is no 
part of it, as he would show later. 
Mr. Smith made some remarks on the characters of the family 
Heterogynidce and the species recently placed in it by Mr. Ed- 
wards. He does not believe it really occurs with us. 
APRIL 5, 1888. 
Twelve persons present. President Schwarz in the chair. 
Mr. Schwarz, from the Publication Committee, reported that 
by an error in proof-reading the record of the election of Mr. 
Ashmead, on August 4, 1887, was omitted. 
Dr. G. H. Horn made some remarks on the genus Pleocoma 
and its place in the Lamellicorn system.* He exhibited a slide 
showing the location of the stigmata on the connecting membrane, 
and proving that Dr. LeConte was correct in his location of the 
genus. He criticises Gerstaecker's paper, recently translated by 
Mr. Smith, f and shows that, convincing as it seems, it is based 
on a positive error of observation. He also believes now that 
the larva described by Osten-Sacken really belongs to this genus. 
Dr. Horn further exhibited a larva of Platypsyllus mounted in 
balsam. This, he stated, was of extreme interest, since it posi- 
tively proved the coleopterous nature of the insect. The larva is 
trulv coleopterous, with well developed mandibles, which are 
shed in the imago stage, and this is the only known instance of 
the loss of the mandibles in a coleopteron. In a paper now in 
press,| ne describes. and figures the larva, and speaks more at 
length of its structure. 
Prof. Riley said he had been extremely interested in Dr. Horn's 
last communication, as he had had the larva of Platypsyllus on 
his desk for some eighteen months, intending, as soon as he could 
get to it, to publish the discovery. They had been collected for 
him by Mr. Bruner, near West Point, Nebraska, and from the 
examination made by him upon their receipt he had concluded 
* See Ent. Amer., iii, pp. 233-235; also Trans. Am. Ent. Soc., xv., pp. 
1-18. 
f Ent. Amer., iii, p, 202. 
\ See Trans. Am. Ent. Soc., xv, pp. 23-26. 
