82 INSECUTOR INSCITI^ MENSTRUUS 



the town of Glacier Park. The habits of these males were 

 abnormal, as they were taken resting in grass, which is never 

 the case with either of the parent species. The only males 

 fotmd were intrudens x lazarensis; but from the appearance 

 of the females, cataphylla x lazarensis, pullatiis x lazarensis 

 and even cataphylla x pullatus occurs. 



These hybrids had the appearance of first crosses, and per- 

 haps do not persist. If they do, we might as well revert to 

 the old appellation of **the mosquito" and let the species go. 



Aedes cataphylla is rare in the forested region west of the 

 divide, but occurs. In the open spaces near forest east of the 

 divide it becomes more abundant. 



Of the species with ringed legs, excrucians and fitchii occur 

 in the forests west of the divide, as is normal for the fauna, 

 and also extend through in wooded patches to the east. The 

 majority of the specimens to the east, however, consists of 

 mutatus, the three forms here in usual association. Many 

 females with speckled wings were taken about Glacier Park 

 Station, which should be fitchii mimesis; but no males were 

 secured to prove the identification, and it may be that the range 

 of variation of mutatus has been underestimated. No males 

 were taken belonging to the stimulans series, so it is not known 

 whether one of these occurs also. 



In detail the occurrence was as follows : 



Aedes punctor Kirby. 



Apparently does not occur. 

 Aedes aestivalis Dyar. 



Not uncommon in the forest to the west of the divide, pre- 

 ferring open spaces. This species breeds in the flood-water 

 particularly of lakes. No larvae were obtained in the National 

 Park, as the season was too far advanced by the time we reached 

 there, and the flood-pools had drained themselves. Larvae were 

 obtained, however, at Sandpoint, Idaho. The larva was pre- 

 viously known in only a single example, bred from eggs se- 

 cured at Kaslo, British Columbia, in 1903. This larva had 

 single head-hairs, but must have been an aberrant example, 



