PROC. ENT. SOC. WASH., VOL. 23, NO. 1, JAN., 1921 17 



AA. Adult female with a pair of heavy spines on 6th to 9th antennal segments 



only. 



B. Adult female with 8-shaped pores on tip of abdomen surrounded 

 with a compound ring; apodous larva circular, with only last 4 

 pairs of spiracles forming an acute angle with the surface; first 

 stage larva with bases of antennae approximate, and exuvium 

 rupturing ventrally; occurring in galls in hark ot pine twigs in 

 Japan and Eastern United States .... ...matsumurae (Kuwana). 



BB. Adult female with 8-shaped pores on tip of abdomen not surrounded 

 with a compound ring; apodous larva oval, with all spiracles per- 

 pendicular to the surface; first stage larva with bases of antennae 

 distant, exuvium rupturing dorsally; occurring exposed on 

 needles of pine in Rocky Mt. Region ... ...acafyptus n. sp. 



Matsucoccus matsumurae (Kuwana). 



KUWANA, S. I. In Insect World, IX, 3 (March, 1905), Figs. 



- Bull. Agr. Exp. Station, Japan, I, 2, p. 209 (1907), Figs. 

 COCKERELL, T. D. A. In Can. Ent. XLI, 2, p. 56. (1909.) 



First stage larvae, adult males and females were found on pine 

 in Japan by Mr. Kuwana at the time he described this species. 

 It was placed by him in the genus Xylococcus, to which it is 

 rather closely related, but later removed from that genus by Dr. 

 Cockerell. 



Lately Mr. Kuwana has found the intermediate stages of both 

 the male and female on Pinus thunbergii. Realizing that the 

 original description needed some correcting and that the inter- 

 mediate stages should be described, he very kindly turned his 

 material over to the writer, being too busy with other matters 

 to describe them himself. 



In the mean time, Mr. Harold Morrison, Coccidologist for the 

 Bureau of Entomology, had received material from the Eastern 

 United States and recognized that the specimens belonged to 

 Matsucoccus, whereupon they were forwarded to the writer. 

 Upon comparison, the writer was surprised to find that they 

 were identical with matsnmurac. 



The Eastern material was collected by Mr. J. G. Sanders on 

 twigs of scrub pine (Pinus virgintana) on Good-hope Hill, 

 District of Columbia, in 1905, by Dr. A. D. Hopkins on pitch 

 pine (P. rigidd) in Pennsylvania in 1906, and from the sanir 

 host by Mr. J. T. Morton on the R. W. de Forest Estate, Center- 

 port, Long Island, New York, in 1919. 



The following descriptions are taken from the Japanese 

 material, augmented by the material from the Eastern United 

 States. 



Adult female. 2.5 to 4.5 mm. long and 1 to 2 mm. broad, in outline elongate 

 oval, somewhat narrowed anteriorly. In life dark brown. Derm mu^li nr 

 crinkled. Antennae transversely striated (except 1st and 2d segments), 



