phaga, no accurate observations have been made as to the parasites 

 l^eeuliar to each species ; and tlie earlier notes of the Station do 

 not in any instance indicate what species were the liosts of the para- 

 sites reared. It is possible, however, that both species of Tachinid 

 fly. Cryptomeigenia avnfacies Walton and Eutrixoides jonesii Walton 

 l)rey npon the adults of this species as well as upon those of tlie two 

 larger species of Phyllophaga. 



The predacious wireworni, Pyruphorous ltiyni)iosus lUiger, is as 

 trulj^ an enemj- of this white grub as of the two larger species. 



The only stages of the species that have been found infected by 

 the fungus are the egg, five of which were found covered witli sjiores 

 in June, in experimental jars, and the adult. 



THE LITTLE BROWN MAY-BEETLE. 



Pliy talus i}tsularis n. sp.* 



This ^lay beetle is so nnu*h siuMller than tlie four preceding 

 s])ecies as to be at once distinguishable from tliem, even to the lay- 

 man. The type specimens of the species are from Santa Rita, in 

 the Guanica district, collected by tlie writer. The species lias also 

 becm collected at Aiiasco. Garrochales (near Arecibo). San Jiuiii. Rio 

 I'iedras and La Plata, so that its distribution is probal)ly general 

 over the western two-thirds of the Island. Whether it occni-s at the 

 eastern pni't of the Island is not knowu. More specimens by far 

 have come from the Guanic;i distri( t than from all other loejilities 

 combiued. 



As both larvae and adults have been collected in the cjiiie belda 

 at Santa Rita, this species is considered among the cane pests. It 

 is not, however, of iiuich imi>ortance as a pest either to cane or to 

 other crops, because of its scarcit.y. The mature grub l)eing no larger 

 than the sugar-cane white-grub is ;it the end of the first iiistar, it 

 would require ten or more of them to equal in weight one mature 

 grub of the lai'ger species. rin<l Ihe .l.iiuage committed by e;ieli must 

 be coi-respondingly small. 



Usually, among the grubs gathered in the plowed c;ine fields :it 

 Santa Rita by the grub pickei-s emi)loye(l by Guanica Centtnle. were 

 to be founil fewei- th.in ;i dozen gi'ubs of this ]\Iay-beetle to each 

 thousand of the sugnr-cane white-gi'u.b. Often there wei-e none; only 

 certain fields contained grubs of this species. On the (tci-jision when 



* This species was first im-iitioiifd in ilic Tliinl Ropoit of llii- Boaid i)f ('ciiiiiiiis.-.ion(ns 

 of .\sriculture of Porto Rico (page 42), under the name of "Lachnosterna pequefia," and 

 :i siinuiiiiry of its lifecyclc ((•.\<c])t the pri' -oviposition ) ffivcii in the Fnurtli Report of tlie 

 Board Cpase 47) under the same name. 



163 



