296 THE CANADIAN ENTOMOLOGIST 



A CONTRIBUTION TOWARDS THE TAXONOMY OF THE 



DELPHACIDM. 



BY F. MUIR, 

 Hawaiian Sugar Planters' Experiment Station, Honolulu, T.H. 



[Continued from Page 270] 



DELFHACINI. 



1 (6) Mesonotum with five carinae. 



2 (3) Two medio-longitudinal frontal carinse, j Micromasoria. 



meeting together at base and apex \Livatis*. 



3 (2) One medio-longitudinal frontal carina. 



4 (5) In profile head semicircular; antennae terete Paranda. 



5 (4) In profile head not semicircular; first joint of antennae 



compressed and dilated, obliquely triangular, second 

 slightly longer than first Eodelphax. 



6 (1) Mesonotum with three carinae or less. 



7 (20) Antennae with one or both segments distinctly flattened. 



8 (9) Two medio-longitudinal frontal carinae, distinct through- 



out or approximate at one or both ends.. Psendarceoptis. 



9 (8) One medio-longitudinal frontal carina, simple or furcate. 



10 (13) First antennal . joint long, subparallel sided, semi- 



foliaceous, antennae as long as face and clypeus 

 together. 



11 (12) Head as wide, or nearly as wide, as pronotum. ..Z)^//>/;a.r. 



12 (11) Head narrower than pronotam Sparnia. 



13 (10) First joint of antennae subtriangular or sagittate, 



antennae not as long as face and clypeus together. 



14 (15) Length of face equal to width between eyes; clypeus 



angled in middle, the median carina forming deep keel 

 at bend Bostara. 



15 (14) Length of face considerably greater than width. 



16 (17) First joint of antennae sagittate, antennae not as long as 



face; medio-longitudinal carina of face furcate at 

 extreme base; sides of face slightly arcuate; clypeus 

 bent nearly at right angle in middle Belocera. 



17 (16) First joint of antennae triangular, but not sagittate; 



clypeus not angular in middle. 



*I can find no distinctions between these two genera from the descriptions. 

 September, 1915 



