CHERMES OF MAINE CONIFERS. 295 



of the mesothorax, and a row of 4 well denned and separated 

 groups which are in line with those of the abdomen; abdomen 

 with lateral groups on I-IX (merged to caudal group on IX), 

 I- VI with a dorsal row of 4 groups on each segment, the median 

 ones being largest but not merged. 



The Winged Oviparous Form. Migrant. (Fig. 118). Newly 

 molted individuals have prothorax and abdomen light yellow- 

 ish brown, head and thoracic lobes dark, legs and antennae 

 greenish, wings decidedly green with yellow proximal portion 

 The individuals, of course, grow darker as they age. Body 

 length about 1.9 mm. ; wing expanse 6 mm. to 6.2 mm. 



The well defined areas of wax pores are: head with 2 dis- 

 tinct anterior groups and 2 large and separate posterior groups; 

 prothorax with the usual lateral area, a row of 4 anterior groups, 

 and 2 posterior groups widely separated ; mesothorax with two 

 median distinct groups; metathorax with two median groups 

 separate and in line with the median groups of the abdomen; 

 abdomen with median groups on segments I-VI well defined 

 and widely separated, well marked lateral groups on segments 

 I-IX (merged to caudal group on IX), and a small group between 

 the lateral and median groups on III-VI. 



The antennae (Fig. 119), is more like that of abietis than any 

 of the other species of this paper, but the outlines of the joints 

 are less abrupt, the curves of the sensoria are more regular, 

 and V is typically longer than IV. Ill and IV are about sub- 

 equal. 



The wings resemble those of abietis but are distinct enough, 

 ist A of the fore wing of lariciatus is less strongly arched and 

 M of the hind wing is a heavier vein than that of abietis and 

 strongly curved with the convexity distad. 



July 31, 1909, this species was found to be common on the 

 needles of larch everywhere in the vicinity of Orono. The 

 migrants from the white spruce galls settled on the larch needles 

 and oviposited. The eggs are extruded and not retained in 

 the abdominal cavity as with pinifoliae, and the parent is more 

 easily dislodged even than abietis and soon drops from the 

 egg mass. There are from 50 to 75 beautiful green (paler than 

 larch green) eggs in a cluster. (Fig. 121). They are slightly 

 pulverulent. The glimpse through a glass at this little Chermes 

 with the green eggs showing through her transparent wings 



