56 EXPERIMENT STATION RECORD. [Vol.40 



to accomplish much toward its riddance. In greenhouses where the slugs have 

 become established, they may be collected at night with the aid of a lantern or 

 pocket flashlight and destroyed. Lime is said to be a standard remedy and 

 salt and soot ;ire efficient. 



In a footnote by P. Bartsch it is pointed out that there are 32 species of 

 garden slugs reported from the United States of which four are introduced 

 forms. Most of the native species are comparatively harmless so far as their 

 ravages on crops and gardens are concerned. The real pests of gardens, cellars, 

 and walls are three introduced species, namely, the spotted garden slug (L. 

 maximus), here considered by the author; the tawny garden slug (L. flarus), 

 which rarely attains a Length of over 4 in. ; and the true garden slug (Agriolimax 

 agreatis), which is the smallest species, scarcely exceeding 1.5 in. in length, and 

 Which is probably the greatest pest of all the slugs in this country. 



[Economic insects and rodents in California] (Ho. Bui. Cal. Com. Hort., 7 

 (191S). No. h- PP- 1 '.'6-209. 211-215, figs. 15). — The several papers here presented 

 include the following: The Pink Bollworm of Cotton, by H. S. Smith (pp. 

 196-198) ; The Potato Tuber Moth, by E. R. de Ong (pp. 198-201) ; Fruit Flies 

 of Economic Importance in California: Currant Fruit Fly {Bpochra cana- 

 densis), by H. H. P. Severin (pp. 201 206) ; Poisoned Grain Baits for Rodents, 

 by M. R. Miller (pp. 206 209) : and Test Control for April (pp. 21] 215). 



Acarina and Insecta of Barbados, .1. R. BoTELL {Rpt. Dcpt. Agr. Barbados, 

 l'.n^-ii. pp. )■'< 55). This is a preliminary annotated list of the ticks, mifc 

 and insects of Barbados, exclusive of the Coccida\ which has been previously 

 noted (E. s. K.. ::•;. p. 252). 



Twentieth annual report of the State entomologist for 1917, E. E. WOBSB \m 

 <r;„. Bd. Ent. Bui. 51 {1918), pp. ',/. pi. 1. figs. 3).— Included in this report are 

 accounts of the boll weevil in Georgia, where it now occurs in the greater part 

 of the State: of pecan insects, a report upon which by Turner has been previ- 

 ously noted i EL s. R., 38, p. 762) ; etc. 



Report of the entomologist. R. II. Van ZWALTTWINBUBG {Porto Rico Sta. 

 Rpt. 1917, pp- SI 84). — The author first reports upon biological studies of the 

 rattle tick, the results of which are presented in tabular form and include the 

 preoviposition and ovlposltlon periods of female ticks kept in closed tins in 

 weather shelter compared with the same period under natural conditions and the 

 Incubation period <>f the eggs in weather shelter and under natural conditions. 

 Of 130 engorged ticks passed through a dip containing 0.16 per cent arsenious 

 oxid only ::<> < •_':: per cut) died without laying. 



The larva of an undetermined phorid fly, first noted during the year, is said 

 to be largely responsible for the failure of a large percentage of the ears of 

 corn to set kernels. This dipteran deposits eggs in clusters of 26 or more 

 among the strands of the new silk, several clusters often being placed in the tuft 

 of a single ear. Upon emerging from the egg the larva? feed on the silk strands 

 and follow them downward. Often practically all of the strands will he de- 

 stroyed in this way before the silk has been pollinated, thus preventing the set- 

 ting of kernels. In June over 75 per cent of the ears ih a field at the station 

 were found either infested with larva 1 or with egss in the silk tuft. 



Miscellaneous notes include mention of the noctuid moth Noropsit Mero- 

 glyphica which feeds commonly on the foliage of Waltheria americana and has 

 :!!<,) been reared upon MorOngia leptoolada; a heavy infestation of rose apple 

 frtnts {Eugenia jambos) by the mango fruit fly {Anastrepha fraterculus). 

 Which Is the flrsl record of this plant as its host in Porto Rico; a general out- 

 break of the noctuid \hlmpntis januaris on guania {Inga lamina) in the vicin- 

 ity of Mayaguez; serious attacks by the slug Verotlict lla OC&dentaUa OB beans 

 and tobacco; and the occurrence of Couchospi* angrceci upon vanilla. 



