﻿Ilcfcroph ra of (^rrnihuTH Lahc lii'ylou 67 



])y far most coininon on willow. Many adults and nyniplis, repre- 

 senting three or four instars, were collected on Salix spp. during: 

 the summers of 1917, 1919 and 1920. Adults have been observed 

 in the field with their beaks impaled in Corythucha eJegans Drake, 

 C. mollicuhi 0. & D. and C. imllipes Parshley. The writer has 

 also found the insect in the egg-galleries of several bark beetles 

 (Ohio Journal Science, Vol. XXI, pp. 201-206, 1921), but it 

 does not seem to breed or normally live there. Field observations 

 during the summers of 1919 and 1920 show only one generation 

 a year, the first adults beginning to emerge about the middle of 

 July. Only the larger nymphs and adults were collected during 

 the latter part of the summers. 



Anthocoris sp. (Plate II; h). 



This peculiar and very interesting insect w'as only taken in 

 the nymphal stages. 'It lives largely in the burrows of bark and 

 ambrosia beetles or in the crevices and beneath the scales of the 

 bark of coniferous trees, particularly spruce. It is rarely found 

 in the galleries of Ipidae in hardwoods. Specimens (Drake, Ohio 

 Journal of Science, Vol. XXI, pp. 201-206, 1921) have been found 

 in the burrows of Polygraph us riifipennis Kirby, Dryocoetes piceae 

 Hopkins, Dryocoetes americana Hopkins, Orthotomicus caelatus 

 Eichlr., Trypodendron bivittatum Kirby, Ips pini Say, Pityogenes 

 hopkinsi Swaine, Trypodendron hetidae Swaine, Anisandrus 

 ohesus Le Conte and Xyloterinus poliius Say. Four distinct 

 nymphal stages were found in the burrows of Polygraphus riifipen- 

 nis, Dryocoetes americana and Orthotomicus caelatus in spruce 

 logs that had been felled during the previous winter (1919). Only 

 very young nymphs, probably the second and third instar w^ere 

 found during the latter part of May and forepart of June; later 

 in the summer only the large nymphs were collected. Nymphs, 

 probably in the last two instars, were placed in breeding cages at 

 Barber Point and then carried to Syracuse about the first of 

 September. These specimens w^ere fed small insects, but they all 

 died before they reached the mature state. Records seem to indi- 

 cate that the adult state is probably found during the late fall. 

 Numerous specimens taken in the field about the first of September, 

 1920, were mostly in the last instar. The insect is undoubtedly 

 an important enemy of both bark and ambrosia beetles, also other 

 small and very young larvae of wood-destroying insects. In the 

 breeding cages the nymphs readily feed upon small larvae and 

 insects, also upon dead larvae and dead insects. 



Tetraphleps osborni n. sp. (Plate II; d). 



Head, thorax and abdomen dark piceous and shining. Abdomen 

 beneath dark piceous sometimes slightly tinged with reddish brown, 

 the pubescence sparse and grayish. Hemelytra brown or dark 

 brown, with greater part of embolium and cuneus lighter ; mem- 

 brane smoky, usually with pale streaks following the nervures. 

 Pubescence fine, slightly curled, pale. Antennae dark brown, tlie 



