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I2TSECT CONDITIONS IN PORTO RICO DURING JUNE, 1931. ' 
M. D, Leonard 
Insular Experiment Station, Rio Piedras, Porto Rico. 
June "beetles, Phyllophaga spp., had so badly stripped the leaves of a 
young cane field at Isabela early in May according to Dr.' G. N.' folcott 
that it seemed the plants could hardly recover. However, when I visited 
it, in company with Dr. Wolcott and J, G. Myers, on June 1, much new growth 
was present owing to recent heavy rains; the older leaves were "badly damaged.. 
Only two "beetles of Phyllophaga portoricensis Smyth were observed 
during three hours' collecting at the several large lights at the Sugar 
Company's hotel at Aguirre on the night of June2(G.N.W. and M.D.L.).' They 
were entirely absent during the nights of June 27 and 28, (M.D.L.) 
Ligyrus tumulosus Burm. adults were common at the lights at the Sugar 
Company's hotel at Aguirre on the night of June 2, but on the nights of 
June 27 and 28 only about a half dozen beetles were observed. 
The adults of the pink leaf-sheath bug, Lasiochilus divisus Champion, 
were observed in fair numbers at the lights of the Sugar Company's hotel • 
at Aguirre on the night of June 2, but were scarce on the nights of June 
27 and 28. 
A leafhopper, Protalebra brasiliensis De Long, has been observed 
breeding abundantly throughout the month on large patches of Bidens pilosa , 
locally called margarita' or clavelillo, on the edges of the El Morro Golf 
Course at San Juan. Mr. Wolcott states that this leafhopper is sometimes 
abundant on cane growing in weedy* sandy fields but that its occurrence 
on cane is accidental, its common food plant being Wedclia trilobata , 
•(Jour. Dept. Agr. P.R, 5 (3): 31, 1921, erroneously det. by Metcalf as 
Erythroneura comes Say.) Adults were found commonly on carrots by R. T. 
Cotton at Rio Piedras in 1917. 
On June 2 a scale ( Kowardia biclavis Comst.), determined by H. Morrison, 
was called to our attention by Mr. T. B. McClelland, Director of the Federal 
Experiment Station at "^ayaguez. It was abundant on the trunks 3 p$»$£f{'£&p s 
of a number of shade trees ( Gliricidia sepium ) of coffee in a large/ experi- 
mental plot which Mr. McClelland has been running for some years. He feels 
that the scale has considerably interfered with the growth and production 
of a number of trees. 
The "vaojuita," Diaprepcs suengleri L., was badly stripping the foliage 
of a number of your.g grapefruit trees at the Substation grounds at Isabela 
on June 1. (G.N.W. and M.D.L.). On June 2, in company with J. G. Myers 
and G. N. Wolcott and Mr. Herbert Osborn, a section of the Aguirre Sugar 
Company's properties, Santa Isabel, near Guyana was visited to look for 
egg parasites of Diaprepes. The beetles 'were •exceedingly abundant on a 
number of good-sized trees of a Eicus, supposedly E. laevigata , growing 
along several roads through the cane fields, and much stripping of their 
