December, '19] holloway and loftix: sugar cane insects 449 



5. Ligyrus rugiceps Lee. 



Common name : The sugar cane beetle. 



Remarks: Occasionally injurious to young corn and sugar cane plants in re- 

 stricted districts. Later in the season, however, Uttle or no injury which can 

 be attributed to this species can be found in cane fields where there was much 

 injury in the spring, the cane plants sending out "suckers" to replace the dead 

 plants. 



6. Lachnostema antennata, L. hurmeisteri, L. crassissima, L. congrua, Cycocephala 



villosa Burm., Dyscinetus trachypygus Burm. 

 Determined by J. J. Davis. 



Common names: (larvaj) white grubs. (Adults) May beetles, June bugs. 

 Remarks : Not noticeably injurious owing to small numbers. 



7. Sphenophorus cariosus Oliv. 



Determined by W. Dwight Pierce. 



Remarks: Only one specimen of this large weevil was found in a young sugar 



cane plant near Houma, La., in 1916. This species would undoubtedly be very 



injurious if it were common. 



8. Limnobaris sp. 



Determined by W. Dwight Pierce. 



Remarks: This is a small weevil, about the size of a corn weevil. The adults 

 are often seen on the leaves of sugar cane during the summer. The larvte 

 make small borings in old cane stubble. No known injury can be attributed 

 to this species. 



9. Drceculacephala mollipes Say. 

 Determined by O. Heidemann. 



Common names: The sharp-headed grain leaf hopper (6). 



Parasites: The eggs are parasitized by Abdella acuminata Ashmead and Gon- 



atocerus koebelei Perkins. Determinations by A. A. Girault. 

 Remarks: Owing to the very efficient egg parasites, this leaf hopper is of no 



economic importance. 



10. DrcECulacephala mollipes minor Walk. 

 Determined by O. Heidemann. 

 Parasites: Same as above. 

 Remarks: Same as above. 



11. Tomaspis bicincla Say. 

 Determined by O. Heidemann. 



Remarks: This froghoppcr is rare on sugar cane. 



12. Aphis biluberculata Wilson. 



Determined by II. F. Wilson and described (5) by him as new. 

 Common name: Brown aphis of sugar cane. 

 Associate: The Argentine ant {I ridomyrmex humilis Mayr.) 

 Remarks: This aphis is not common nor injurious. 



13. Siphn Jlava Forbes. 



Determined by George N. \\'olcott. 



Common name: The yellow sugar cane aphis. 



Remarks: Pound on cane in Ix>ui.siana only once — at .Vngola, La. 



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