160 PROC. ENT. SOC. WASH., VOL. 21, NO. 7, OCT., 1919 



seven pairs of abdominal spiracles, resembling a row of buttons on each 

 side of the abdomen, with smaller button-like processes alternating between 

 them (Plate 13, B.). There are also two pairs of thoracic spiracles. The tip 

 of the abdomen is truncate, bearing a long slender seta on each side. The 

 derm, especially of the abdomen, is lineate. 



The cast skins of the first stage are similar except that the cephalothorax 

 is enormously extended and rounding (Plate 13, F.). 



Larva, second stage. -Cast skins only have been found: these resemble 

 those of the first stage in every way, except that they are very much larger. 



Larva, third stage. -Without eyes, legs or antennae (Plate 14, A.). The 

 spiracles are large and conspicuou , 7 abdominal and 2 thoracic being pres- 

 ent. They are surrounded by a number of small ducts and are set at the 

 inner end of rather long slanting tubes (Plate 14, B.). In life, wax threads 

 extend from these tubes inclining posteriorly. The derm is somewhat chit- 

 inized. The anal tube is absent, anal ring not discernible. 



Mouthparts present in all larval stages. Parts well separated, the in- 

 ternal framework being central with the mentum considerably posterior to it. 



Male . -Unknown . 



Types. Holotype, an adult female (Hopk., U. S. No. 15406B), 

 mounted with the immature stages of the same individual, from 

 within the fascicles of digger pine (Pinus sabiniana) needles, Mt. 

 St. Helena, California. Paratypes of adults and larvae (Hopk., 

 U. S. Nos. 15406B, 15409B and 15813A) from within the fascicles 

 of digger pine and yellow pine (P. ponderosd) needles, Mt. St.. 

 Helena and Placerville, California. Author, collector. Holotype 

 and paratypes in the National Collection of Coccidae. Paratypes 

 also in Forest Insect Collection at Los Gatos, California. 



Besides the above localities, it has been taken recently on digger 

 pine at The Pinnacles, San Benito County, California, by Mr. G. 

 F. Ferris. 



This is a most peculiar coccid occurring in the very interesting 

 and peculiar subfamily, Margarodinae. According to Mr. Ku- 

 wana's description and figures of Matsucoccus matsumurac 

 (Kuwana), this new scale is apparently quite closely related to it 

 in this genus. The adult is especially similar in the transversely 

 striated legs and antennae, and the larva in the odd shaped 

 antennae. This is the second species of the genus Matsucoccus 

 Cockerel!, and is the first representative of the genus in America. 

 The author has also seen an undescribed species of this genus 

 in Mr. G. F. Ferris' possession, taken on Pinus monophylla, 

 which forms a connecting link between fasciculensis and matsu- 

 initnie, lacking several of the peculiarities of the former. Were 

 it not for this undescribed species, fasciculensis would appear to 

 be distinct enough to belong to a separate genus. 



