Plate XNXI. 
Bul. Univ. of Mont., Biol. Series No. 3. 
‘a fw 4q oyoyg *a0uvysIp ey} UL IYSLA ey} UO ST UIeJUNOP! SreagQ “uopvsjsny]! ay} FO a[ppitu ayy uy yead 9] 
-qnop ay} st yvag AVMOTLIS ‘ayVT] [BSNoCovy{ Si punosBa10j ayy ul aye] aUL “Yad [esnoqovjl Wor ysvayyNos MTA 
