186 NEW SPECIES MELYRIDAE. CHRYSOMELIDAE AND TENEBRIONIDAE 



. Elytral vestiture more or less pale 4 



4. Vestiture cinereous but becoming dark and inconspicuous behind the middle 



of the elytra which are broad and depressed 3. expansus Casey 



. Vestiture cinereous with longer, erect black hairs on the elytra 5 



5. Basal angles broadly rounded; pale hairs recumbent 6 



. Basal angles obtuse 7 



6. Size usually under 3 mm. ; pubescence shorter 4. shastensis Blais. 



. Size larger, 4 mm. ; pubescence longer, form more oblong 



5. horridulus, n. subsp. 



7. Thoracic punctures coarse and impressed ; pale hairs suberect.. 6. vicinus Blais. 

 . Thoracic punctures fine and sparse 7. obtusus Casey 



8. Legs pale throughout 9 



. Legs bicolored, femora black 10 



9. Pronotal margins serrulate and deeply sinuate behind the apical angles, 



pubescence blackish 8. nevadensis, n. sp. 



. Pronotal margins feebly serrulate and feebly sinuate anteriorly ; pubescence 



yellowish 9. nitens Casey 



10. Elytral pubescence blackish and inconspicuous but becoming ashy toward 



base; antennae stouter and longer 10. breviusculus Casey 



. Elytral pubescence pale cinereous throughout, even but rather sparse ; 



body more elongate; antennae shorter 11. dissimilis Casey 



11. Elytral vestiture uneven in distribution, brownish-black hairs forming a 



basal and subapical broad fascia _ 12. seminudus Lee. 



. Elytral vestiture uniform in distribution 12 



12. Basal angles of pronotum rounded 13 



. Basal angles more or less distinct 17 



13. Legs black or blackish in color throughout 14 



. Legs more or less pale in color 15 



14. Pubescence coarse, cinereous, dense, short, recumbent, and uniformly dis- 



tributed 13. musculus Fall 



. Pubescence cinereous, moderately dense, rather short, not very coarse, 

 suberect and intermixed toward sides with a few black setae on pro- 

 notum 14. macer Casey 



15. Legs bicolored, pale rufous, femora black 15. cruralis Lee. 



. Legs rufo-ferruginous throughout, femora occasionally slightly darker 16 



16. Prothorax much narrower than the base of the elytra... 16. pusillus Lee. 



. Prothorax equal in width to base of elytra 17. minutus Casey 



17. Basal angles of pronotum subrectangular and distinct, base sinuate within 



the angles ; legs pale 18. angulatus n. sp. 



. Basal angles obtuse 18 



18. Legs dark in color; elytral vestiture consisting of shorter and longer hairs 



which are confusedly intermingled '. 19. fastidiosus Casey 



. Legs entirely pale or bicolored 19 



19. Legs bicolored, femora black ; erect hairs of elytra extremely short and in- 



distinct, only visible toward apex 20. depressulus Casey 



. Legs rufo-testaceous ; pubescence luteo-cinereous, rather long, suberect, 

 consisting especially on elytra of somewhat uniformly mixed shorter, 



more inclined and recurved, longer, and a little less inclined hairs 



21. dementae Fall 



