TRUCK CROP INSECTS. 65 
uted over the southern part of Minnesota but do not extend much 
beyond the middle of the State; dubia, which is very similar to the 
two preceding, has been found as far north as Kittson County and 
as far south as Brown County. Dubia and grandis may be termed 
the northern species. L. grandis is probably the species injurious 
to seedling trees in nurseries in the northern sections. 
Ai : 
KiTTSON | ROSEAU + 
L 
ee hee ee 
zl | I 
MARSHALL \ 1 i 
| 
—--—-—-—- -| BELTRAM! I KOCCHICHING | ! 
| PENNINGTON \ | j i 
aa ’ j 
i REOvaKe ! | | ' othe sb] : 
SSeS aE ee 7 adits eax \ | 
POLK it | J | ! 
in - 
+ | ITABCA 
Sates, A at if- ire i ST Louis I 
z « Paved! ON { 
* ! ili teen 
ORMAN eS) NS | ; 
Wands? 0 | ' a 1 
mr \ a+ 1 
a ale en | e! J 1 
! Sr eT : ay) 
2 ' Cass (asa re 
Clar I! BECKER ~S | ' ! 
J epee l 
hor sabe © Led Me 8 a eee 
ee c zl ! yf | 
a 1 \ es AITKIN CARLTON 
ae t = | | 
2 Se 
ory | a.o ' = 
-) EB ; 
(c: 
| 
stevens! POPE | 
i . 
STEARNS aS 
ISANT 
anes | H SHERBURNE RAD 
SS Se SA t- 
| i WRIGHT 
MEEKER 
. , e * = 
ay ‘ | | ' “Ba 
Qui Parte ~ SO) i SoS Ceraet Sey] 
PNBest- ba —- re 
---—- i CLEOD CARVER ¢ / 
YELLOW MEDICINE ‘: Pie ~ a NS pe \f 
5S i \ ==) —> TAKorA 
. scorr = 
| eS = SIBLEY i ane dae 
| Ce ee lec: . 
oa | YON yy Geet t *Sonicouer 7 \ 5) Cee 
s ry 
nd . ae ; ZLESUEUR: RICE ~ WABASHA 
Set ee eee J crown ~ eel Meee es — -- ‘ 
ALS eg I nig aaa ‘ | t Demy @ay 
Tone | URRAY I corron | tr jetve SRL ene Sap rete ooace, OLMSTED i WINONA 
woop ; ” t ; 
Sar - == eel a ZANfieeS = Ae SNe 
1 1 ! . | 
ROCK | NOBLES | YACKSON | Martin | FARIBAULT | rreesorn! mower PeeCOMORE ae 
Fic. 9. Map of Minnesota showing distribution of Laahnosterna dubia (triangle) 
L. grandis (cross) and L. rugosa (square.) W. Moore. 
From the above data, it will be seen that the June beetles—at 
least one or more of the four species—were abundant in almost 
all parts of the State during the last summer. Probably even in 
those places not marked on the map, the beetles were abundant 
