384 Annals Entomological Society of America [Vol. X, 



3. Pygidium densely and coarsely punctate. Usually with an appendix to the 



second elytral stria yucateca Mars. 



Pygidium finely punctate. Never an appendix to the second stria 



princeps J. Lee. 



4. Sides of thorax moderately coarsely punctate. Mentum without an 



M-shaped excavation 5. 



Side's of thorax impunctate. Mentum with an M-shaped excavation 7. 



5. Front without strides, or the strioles short, feeble and widely separated. 



Species broadly oblong G. 



Front with at least two 'closely approximated, long arcuate striae. Nar- 

 rowly oblong 14. 



6. Front without strioles. Larger 6.5-7 mm vernicis Casey. 



Front with widely separated, short, feeble strioles. Smaller 5.5-6 mm. 



sirpus sp. nov. 



7. Second dorsal stria of elytra interrupted in the basal third, .interrupta Mars. 



8. Elytra with a stria on the basal margin more or less deeply impressed, 



besides the two dorsal striae 9. 



Elytra with but the two dorsal striae quadridentata. 10. 



9. Elytron with a deeply impressed, transverse stria along the basal margin 



equidistant from the second longitudinal stria and the scutellum 



decimstriata sp. n. 

 Elytra with an area, roughened by three longitudinal lines, between the 

 second dorsal stria and the suture. From this area, a very faint finely 

 impressed line extends along the base almost to the scutellum. On each 

 side of the scutellum is a narrow, deep fovea bifoveolata sp. n. 



10. Front with two shallow foveae. Supraorbital stria long, reaching almost 



halfway to the tip of the preocular spine. Head extremely minutely 



punctulate* subsp. * platysma Er. 



Front without foveae, supraorbital stria short 11. 



11. Propygidium not at all, or extremely sparsely punctate on disk. Males 



with the thoracic fossa deep, and well marked 12. 



Propygidium distinctly punctate on disk. Males with the thoracic fossa 

 poorly developed and very shallow subsp. minor nov. 



12. Pygidium evenly punctate, the space enclosed by four punctures equal in 



size to a puncture. First elytral stria closer to the second than to the 



margin 13. 



Pygidium unevenly punctate, the space enclosed by the four punctures 

 being less than half the size of a puncture. First stria midway between 

 second and margin *subsp. quadridentata 



13. Marginal stria of thorax without sinuation subsp. fioridae nov. 



Marginal stria of thorax with a shallow semi-circular sinuation just before 



the middle, and below this on the margin itself a short impres.sed line. . 



floridae var. striatifera nov. 



14. Gula with a carina on each side extending backwards from the mandible, 



elevated in the anterior half, low and interrupted in the posterior half, 

 the two carinae forming a V. Prosternum narrowly truncate at apex, vicina. 15 

 Gula without carinae, but with a Y-shaped groove. Prosternum broadly 

 truncate, its anterior margin elevated and rugulose caseyi sp. n. 



15. Larger 6 mm. Second, third and fourth abdominal stemites punctate for 



their entire width subsp. neglecta Blaisd. 



Smaller 4.5-5 mm. Second abdominal stemites punctate at sides only, 

 third and fourth punctate in a narrow band across the middle of disk 16. 



16. Third elytral stria a puncture vicina Lee. 



Third elytra stria as long as the first vicina var. californica nov. 



*Denotes a form not occurring in the United States. 



