THE CANADIAN ENTOMOLOGIST. 59 



are smaller and fainter, otherwise no change. Plates the same, the thoracic 

 is the most noticeable marking. Length, 43-45 mm. Larvae at Buffalo 

 became normally mature July 22-28 ; the parasitized or diseased examples 

 are in evidence some days later. Necopina larv?e belong to the major 

 section of the genus in having the continuous dorsal line and no accessory 

 tubercle IVa on joint ten. Excepting a very slight degree of colour or 

 size, there is little to differentiate them from a dozen other species. 



The pupal change occurs outside of the boring under a slight depth 

 of soil or refuse. It is a very normal pupa, and shows no character of 

 individuality. The head and thoracic region are smooth, and show no 

 unusual development. The anal spur consists of two minute points. 

 Colour glossy chestnut-brown. Length, 20-24 mm. 



The dates of emergence for a dozen specimens are Aug. 24th to 

 Sept. 9th. 



This species does not occur at Rye, N. Y., but seems most diffused 

 north and north-westward. Imperturbata, Bird, from Western Pennsyl- 

 vania, appears to be a geographical race, of smaller size and having paler 

 secondaries. An absence of larval difference points to this end; though a 

 different food-plant, a pupal change in the burrow and a slightly later 

 emergence bespeak some individuality from the features prevailing in the 

 Buffalo colonies of necopina. 



Establishing the identity of Grote's species leaves the local form, 

 discovered many years ago by the writer, without name, and for which the 

 following is proposed : 



Papaipema maritima, n. sp. — Ground colour of the imago dark 

 grayish-brown, or it may become somewhat olivaceous. Head is of the 

 darker shade, the white scales at the base of the antennae are not seen in 

 this species. The antennae are simple, a little heavier in the male. The 

 vestiture of the thorax is heavy and looser than with most species, of the 

 uniform ground hue densely powdered with grayish-white atoms. The 

 erect thoracic tuft is loose, of conical form rather than the adze shape 

 which usually holds. At rest it is tilted a little forward of perpendicular. 

 The abdomen lacks the white powderings and the tufts are hardly discern- 

 ible. The denuded head is perfectly smooth in front. Primaries nearly 

 uniform in colour, powdered with grayish-white scales, the median space 

 slightly darker; the t. p. line may be faintly made out, though it is never 

 prominent. The t. a. line is still more faint, but it can usually be seen in 

 the lower half of its course ; both are indistinctly double. Ordinary spots 



