254 Forty-ninth Report on the State Museum 



about three times longer than wide and are terminated each by a minute 

 segment one-fifth its length ; the larger segment of the spring with a few 

 long setae, posterior margin toothed minutely (fig. 25). Tergite of 

 terminal segment shorter laterally ; pleurite produced ventrally, shorter 

 dorsally, and including lateral portions of the tergite. Long setae occur 

 on the ventral and caudal margins of this segment. Length nearly 

 0.05 inch. 



Described from numerous specimens in the State collection. 



The only reference to the above in my Reports is the following inci- 

 dental one : "I have seen at a glance, in a locality near Albany, within 

 a small extent of roadway, of a single species of a snow-flea — a Podura, 

 more individuals as computed by me, than there are human beings on 

 the entire face of the globe " {Eighth Report on the Insects of New York, 

 1893, page 266). 



My original note regarding the occurrence of this insect has recently 

 come to light. It reads as follows : 



April 26, 1870. Visited Center for the first time this spring. The day 

 was cold and windy. Took one example of Thecla arsace \Irus\ and two 

 males of a Geometrid, Aspilates coloraria (Fabr.), of which several were 

 seen resting on damp ground. 



Immense numbers of a very small black Podura were seen in the 

 wagon-ruts of the road near some standing water, extending perhaps 

 some three rods from it. For this distance, the Poduridae almost black- 

 ened the sand, but at several points they were gathered in a dense mass, 

 of six or eight inches in extent, and nearly half an inch in thickness. 

 There were undoubtedly millions of the little insect assembled at this 

 locality. Scarcely any motion was observable in these masses, unless dis- 

 turbed, when they became quite active, leaping in every direction a dis- 

 tance of about an inch. 



Tyroglyphus heteromorphus n. sp.* 

 A Carnatiofi Mite. 



(Ord. Acarina: Fam. Acarid^.) 



A number of carnations in the greenhouse of Samuel Wheeler, Berlin, 

 Mass., were observed to die gradually at the base, and in time the plants 

 perished. The stems usually began to decay just below the surface of 

 the ground. In some cases the whole plant, and in others individual 



* Communicated by E. P. Felt. 



