248 [October, 1900. 



Dactylopius olacialts, n. sp. 



$ . Adult covered with very long, slender, white, wavy fila- 

 ments, when denuded of these it is short, ovate, somewhat clypeate 

 in front, and has the segmentation very pronounced. Dorsum 

 with large isolated groups of tubular spinneretts, with a large 

 central pore ; and there are many long slender hairs scattered over 

 the body. 



Antennse (fig. 1), remarkably long for the size of the insect, 

 are of 9 joints, very slender, and present a few fine hairs, formula 

 (2, 3) (4, 5) 1, 6, 7, 8, 9). 



Legs longer than antennse ; tarsus scarcely one-third the 

 length of the tibiae ; digitules to claw very faintly dilate, tarsal 

 pair represented by a bristle. Anal ring of six hairs. Anal lobes 

 normal, setiferoue, and spiny. Long., 2'50 — 3"50 mm. 



Larva. Antennae of 6 joints, slightly claviform, 6 nearly as 

 Fig. 1. Fig. 2. long as 2, 3, 4, and 5 together, formula (1, 4, 5) (2, 3) 6. 



Sah. : Courmayeur, Italy, associated with ants (sp. non det.), 

 under granite blocks forming the moraine of the glacier. Collected 

 by Mr. B. Tomlin, September, 1899. 



This is altogether a most interesting species. Mr. Tomlin informs 

 me he was particularly attracted by the long white filaments which 

 clothed the insect's body, which he says waved in the air like delicate 

 silken threads. Such a character as this is exceptional among subter- 

 ranean Coccids. Other striking features are the compound groups of 

 spinneretts, and the unusually long antennae and legs. 



When the specimens reached me they were still living, but 

 unfortunately were denuded of their wavy coats. With the Coccids 

 were found a very remarkable Hymenopterous parasite, which exhi- 

 bited such extraordinary jumping powers that it was by the merest 

 bit of good luck it was recaptured. The insect had hatched out 

 during transit, and noting its peculiar form I submitted it to Dr. L. 

 O. Howard, who has kindly sent me the following interesting parti- 

 culars : — " I am especially interested in the single specimen which you 

 bred from Dactylopius glacialis, and I do wish you had succeeded in 

 rearing other specimens, for so far as I can see this is the hitherto 

 unknown winged form of the genus JDinocarsis, and is a striking and 

 beautiful insect. * * * Tour note on the extraordinary jumping 

 powers of Dinocarsis is a verification of what I have frequently 

 observed in other Encyrtines. They are all great jumpers, and while 

 there is no great enlargement of the hind femora there is a strikiog 

 modification of the middle tibiae and tarsi. At the top of the tibiae 

 is a strong spur, which is movable upon its basal articulation, and may 



