Year Jan. 
1915 
1916 |/+++) 
OOo, 
The Genus Hylastes, Er. 149 
Tabular Summary of Laboratory Observations on H. ater. 
l ] | 
Feb. | Mar. | April} May | June | July | Aug. Sept. | Oct. | Nov. | Dec 
Ppa Ras vie: 
I | = Oi — @ 
Se ape niert cleat tea it tlt +4 
OMOOOOIOStl:-: -----!+ -O]-O©-:>-> Seis y= 
p@t ttt s fee ke | 
- + + = adult beetles. © © = larve resting to pupate. 
= eggs. @ @ — pupe. 
— -— = larve. 
The above table shows that ZH. ater is to be found in the imago and larva 
stages throughout. the year, and that egg 
months only, from April to August. 
s and pup are found in the warmer 
SUMMARY OF FIELD OBSERVATIONS ON H. ATER. 
October 
November 
December 
January 
February 
March 
Month 
April 
June 
July 
August 
| 
September | 
Locality Stages’ Remarks 
Tully Methlick, The occurrence of eggs at this time is 
Aberdeenshire unusual. 
Aberdeenshire Wedges Oe) This is the more usual occurrence. 
The adults were recently emerged 
and the larvee full grown. 
Peeblesshire Ree Weta Adults feeding on young conifers and 
Scots pine stumps. Larve half and 
full grown. 
Fifeshire ae pea ) 
Tar hie oS | pas feeding (immature). Larvee 
aon do: 7 ull grown and others resting to 
dios ae | pupate. 
do. do. ) 
do. fk a Oe All larvee lying to anaes 
Peeblesshire ++ 2%@®@ Some of the adults, newly emerged 
(still pale in colour). Others feeding g 
on larch plants. 
Midlothian ++2@ Adults pairing, some in galleries, some 
5 in soil. Brood galleries begun. 
do. ++©@:--—-— | Eggs Jaid ; newly- -hatched larvee pre- 
sent in the brood-galleries. Some 
adults only begun ~ boring ; others 
still feeding. 
lo. serge eh Ges - |Some adults still feeding (probably 
late-hatched individuals “of previous 
autumn brood). 
do. nx Pi daa ee Some adults just begun boring. Larve 
ox ) full grown and ready to pupate. 
3 = Pupx becoming tinged with yellow. 
do, ++@--« Adults newly emerged and feeding on 
Peeblesshire do. | recently felled stump. Larve of all 
*) | sizes and pupe. 
do, ++++-+©@ | Young and old adults feeding. Some 
(probably old) adults begun ego 
laying again. In some “galleries 
are newly-hatched larve. 
