NOVEMBEB 1, 1907] 



SCIENCE 



595 



expertness of the dextral sensory and muscular 

 organs of the body ; the union of right-handed- 

 ness, right-eyedness, right-earedness and right- 

 footedness. The innervational centers of the 

 more expert organs are located in the left side 

 of the brain. 



Sinistroexperiness. — Conjoint and superior 

 expertness of the sinistral sensory and mus- 

 cular organs of the body; the union of left- 

 handedness, left-eyedness, left-earedness, and 

 left-footedness. The innervational centers of 

 the more expert organs are located in the right 

 half-brain. 



Mixed Dexirosinistral Expertness. — Some of 

 the centers of the more expert organs in con- 

 joint action are located in one, and some in 

 the opposite half-brain. What was once 

 meant by the really meaningless term "am- 

 bidexterity," as applied only to the hands. 



Trailing Hand, "The Trailer."— In syn- 

 chronous writing of both hands, that upon 

 which the attention, visual or central, is not 

 fixed. 



Visual Attention. — That existing when the 

 eyes consciously observe a fixed or moving ob- 

 ject; during the act central or mental atten- 

 tion is fused with it. 



Central Attention. — The "imagination," or 

 mental remaking, of the image, by the mind 

 or central mechanism when the peripheral 

 visual attention is abrogated. 



Single-stream Visual Attention. — That fonn 

 of visual attention existing when the eyes fol- 

 low a linear concatenation of single or unitary 

 macular images to the exclusion of all others. 

 Single-stream Central Vistial Attention. — 

 That when the central visual attention, with- 

 out objectively forming images, follows the 

 passing of imagined single or unitary images 

 in single file. 



Multiple Synchronous Visual Attention. — 

 That when the attention recognizes two or 

 more discrete sets of retinal images at the 

 same time — as when the musician reads sev- 

 eral staflis of music-notes, observes key-boards 

 and pedals, the indications as to stops, tempo, 

 expression, etc. 



Multiple Synchronous Central Visual At- 

 tention. — The imagining or mental reproduc- 



tion of multiple synchronous visual trains 

 without the objectively formed images. 



Single-stream Auditory Attention. — That 

 when a monotone, a sound, or concatenation 

 of single notes or sounds, is listened to, ex- 

 clusive of others. 



Single-stream Central Auditory Attention. 

 — That without the objective audition. 



Multiple Synchronous Auditory Attention. — 

 Two or more synchronous tones or sounds, or 

 lines of such tones or sounds, are recognized 

 by consciousness, as in the case of the or- 

 chestra-leader who gives attention to a large 

 number. 



Compound Synchronous Attention. — In this 

 the consciousness recognizes and correlates or 

 combines multiple streams of synchronous and 

 diverse stimuli, visual, auditory, etc. Illus- 

 trated by expert telegraphers, locomotive engi- 

 neers, musicians, etc., seeing, hearing and feel- 

 ing consciously at one instant. 



George M. Gould 



color varieties of lo0ustid.e 

 In Science for August 16, 1907, Mr. A. 

 Pranklin Shull publishes some notes on a 

 pink form of Amhlycorypha oilongifolia and 

 calls attention to the rarity of records and 

 data relating to such specimens. Mr. Shull's 

 comniunication touches upon a most interest- 

 ing subject that has been but little investi- 

 gated, namely, the direct influence of food 

 upon the coloration of certain phytophagous 

 insects. The following remarks may stimu- 

 late some investigator to take up this neglected 

 subject. 



A live specimen of the pink form of Amhly- 

 corypha oilongifolia was recently presented to 

 the National Museum by Dr. J. N. Eose, who 

 captured it at the New York Botanical Gar- 

 den on August 15, 1907. This specimen is 

 perhaps the most richly colored one that has 

 come to notice and it was captured in sur- 

 roundings that suggest a derivation of this 

 unusual coloration from food. The follow- 

 ing descriptive notes were made from the liv- 

 ing insect. The color is a deep rose, which 

 could almost be called a crimson; it shows a 

 delicate but distinct violet tinge. This violet 



