158 Mr. T. D. A. Cockerell — Descriptions and 



EXPLANATION OF THE PLATES. 

 Plate IV. 



Fig. 1. Bursa gnorima. 



Fig. 2. Alectrgon (Phrontis) alcimus. 



Fig. 3. (Hima) protrusidens. 



Fig. 4. ( ) givatkinianus. 



Fig. 5. Pisania townsendi. 

 Fig. 6. Mitra vaticinator. 



Fig. 7. (Pusia) itelna. 



Fig. 8. Lamellaria (C/ielgnotus) berghi, Desli. (juv.). 

 Fig. 9. Melanella lampra. 

 Fig. 10. Mucronalia aethria. 

 Fig. 11. Turbonilla umbrina. 



Pig. 12. exilispira. 



Fig. 13. patruelis. 



P'ig. 14. thryallis. 



Fig. 15. Styloptygma clymene. 

 Fig. 16. Eulimella aquarromla. 

 Fig. 17. Cingulina secernenda. 

 Fig. 18. Triphora incolwnis. 



Plate V. 



Fig. 19. Amphithalamus psomus. 



Fig. 20. Bissoina {Chiliostigma) refugium. 



Fig. 21. Fossarus eutorniscus. 



Fig. 22. (Couthouyia) cancelZarius. 



p)g. 23. Triphora interpres. 

 Fig. 24. Leptoihyra miltochrista. 

 P'ig. 25. Minolta charmosgne. 



Fig. 26. ■ (Conotrochus) eutyches. 



Fig. 27. Fuchelus xeniolum. 



Fig. 28. Cylichna euthlasta. 



P'ig. 29. Oxgno'e omega. 



Fig. 30. Cylindrobulla systremma. 



P'ig. 31. pJentalium tomlini. 



P'ig. 32. Phacoides malcolmensis. 



Fig. 33. Divaricella cypseiis. 



Fig. 34. Ogpricardia vertumnalium. 



Fig. 35. Carditella concinna. 



XVII. — Descriptions and Records of Bees. — LXXIX. 

 By T. D. A. Cockerell, University of Colorado. 



Col/etes gigas, sp. n. 



? . — Length about 17 mm. ; anterior wing 12 mm. 

 Black, including legs and antennae, the middle of flagellum 

 faintly reddish beneath j tegulse clear ferruginous; hair of 



