\i,ii . roWA" aca'dkmv"- or sconces: 



j>ale Hrown head, while the latter have one hhick s;)(ft \'>:u'k 

 af each eye and one oit the vertex. M. kjmda is }>i-()l>al)l\ 

 siiio-lc T>i-(){xled, as- none <.vf the hiFvsi wbich entered the otirth 

 June 1st have pn4)ated, hut up to. date. Sei)teui.lxn* 2d, 

 have on.-ly conrtracted to on.e-ha}| the len-gth. 



Mmiostegki igneta npfx-ars* and iigaiiv disapi)ear^ ahA)ut a 

 month earlier than the old pest H. rtwctdc&tus- {J^04':\. T!ie 

 younu' lai-\te, therefore, are plenty Inifore the strawberry 

 phmts bei>-in- hlooniini! aiKl hence can he easily exteriiMnated 

 by tlie applh^atiou of any of the ars^nueal pois(Mis witlioat 

 the dan-i^er of [X)isoiiii>g" tlie herrie^v. These [xdsoi^s can be 

 effectively applied alxHit the hitter part o£ April or tirst of 

 May. 



THE CRYSTALUNE. ROCKS OF MISSOURI.^ 



BV PK.OF.K RASMUS HAWORIH , PH. 1). 



iA/'sirnai.) 



Ill the May and rlune ininil>ers Aniericau Geoi'oiiist the 

 Writer published a preliminary deseriptioii and classiticatioiii 

 of the ciystalline focks «>f Missouri. Since that tin^e consid- 

 erable more field work has b(>en done, and nmch new material 

 «>-ather(Kl which is n(m' l>ein!u- (^v.anvin.l'd in. the lalM)ratory, 

 'Llius far nothinii- has beeui disco-verttJ. wliich would originate- 

 any new ideas regarding th<' geology (m- [>etrographv of the 

 district under discussion, but a great deal of c-vidonce has- 

 been ol>taJned eonfirining vi(!ws advanced in th.e publication 

 above mentioned. 



The relative ages of the <'rystalliiie antl s<^liii»entary rocks', 

 may U'^w l)e considered established. The stKlimentary rocks 

 •Are younger than th<; underlying granites and ixn-phyries. 

 This has been stated by every geologist who has written on 

 the subject, but the evidence, so far as made known, was sim- 

 ply that of super-position. This evidently is not conclusive : 



1 . Kead by L<.ii!«.-nS of »h« Director of ihc U. S. Ccologii al Survey. 



