78 



PROC. ENT. SOC. WASH., VOL. 24, NO. 2, MAR., 1922 



wholly incorrect to homologize the "superlinguae" of insects 

 with the first maxillae (maxillulae) of Crustacea, and to homolo- 

 gize the first maxillae of insects with the second maxillae of 

 Crustacea, etc., as is done by recent investigators who have 

 not made a sufficiently thorough comparison of the structures 

 in question in the two groups of arthropods. 



FIG. 5 



FIG. 6 



Textfigure 5. Ventral view of anterior portion of embryo of Anurida, after 

 Folsom, 1900. Textfigure 6. Same of the isopod crustacean Jaera, 

 after McMurrich, 1895. 1, optic ganglion; 2, cerebral ganglion; 3, pre- 

 antennular ganglion; 4, antennular ganglion; 5, antennal ganglion; 6, 

 mandibular ganglion; a, upper lip or labrum; b, first antenna (antennule) 

 of crustacean, antenna of insect; c, second antenna of crustacean, mouth 

 fold of insect; d, mandible; e, paragnath; f, first maxilla (maxillula) of 

 crustacean, maxilla of insect; g, second maxilla of crustacean, labium of 

 insect; h, first maxilliped of crustacean, prothoracic leg of insect; i, liver of 

 crustacean. 



BIBLIOGRAPHY. 



Boas, 1883. Studien ueber Malakostraken. Morphol. Jahrb., 8, p. 485. 



Boerner, 1909. Beissmandibel der Insekten. Zool. Anz., 34, p. 100; also 

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Caiman, 1896. Genus Anaspides. Trans. Roy. Soc. Edinburgh, 38, p. 787. 



Crampton, 1918. Maxillae of Orthoptera. Psyche, 23, p. 83; also Evolution 

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