~79~ 
INSECT GONblbtOSB Itf MEXICO IIP TO MARCH 9, 1931. 
A. H. Amis and A. 17. Morrill. 
Cutworms (itfoctuidae) have done little or no damage during- the 
present season. These insects usually cause considerable damage to the 
first setting of the tomato crop. 
A flea hopper, Haiti cus brae tea tus Say, has been practically absent 
during the present season, as has been the case since its unexplained 
decline in numbers during the vegetable season of 1926-27. For a period 
of two or three years ended;; with the calendar year 1926 this insect 
caused extensive damage to tomatoes in the State of Sinaloa, but during 
the last years has rarely been found in tomato fields and only occasionally 
in seed beds during the fall months. 
A leaf 'folder ( Phthorima ea lycopersicella Busck) was at first quite 
severe in the tomato seed beds and early plantings in the fall of 1930, 
but up to the present time (March 9) has been doing little or no damage 
to the fruit. It is invariably present in injurious numbers during the 
latter part of March and through April and May and damage is therefore 
anticipated. 
A stalk borer (Trichobaris sp. ) has been rather serious on tomato 
plants in the river sections in Sinaloa. This is the first observation 
of noticeable' damage from this insect during the past eight years of 
observations. The cocklcbur is an alternate host plant. 
The potato aphid ( Macro si phu m solanif olii Ashm. ) has been unusually 
prevalent and has done considerable damage to bell peppers this season in 
the State of Sinaloa. 
The. pea aphid (illinoia pisi gait.) has been unusually abundant on 
the entire west coast of Mexico where peas were planted, especially in the 
Fuerte and Yaqui Valleys. 
The corn ear worm { Eel io thi s obs ol eta Fab. ) has been responsible for 
only a small, percentage of loss of corn this season. 
The last cotton crop or. the Mexican west coast was seriously affected 
by a mirid bug. Presumably the Mexican species is the same as that 
identified by Dr. Knight in 1928 as Creontia des A.-'oljls Var D. which 
attacks the squares in a manner similar to the attack of Lygus elisus 
Van D. in Arizona and California. 
