405 



each which appears to be constant. In cros this structure is much 

 more broadly curved than in the other two, lacking definite bends be- 

 tween the several regions. The supplementary key under inquiiiatus 

 tabulates these differences. 



None of our specimens was reared. 



21. OlDAEMATOPHORUS PAN n. sp. PI. XL VI, fig. 3. PI. LI, fig. 10. 



Head, body and legs white, marked as in cros. The paired spots on the 

 abdomen are more conspicuous than in either inquinatus or eras. Scales on 

 terminal margins of abdominal segments raised. 



Primaries white with scanty gray-brown irroration. In the most heavily 

 marked specimens this irroration darkens tlie costa in its basal half and streaks 

 the remainder of the wing. The black costal dash over the base of the cleft is 

 conspicuous and usually definitely separated from the discal area by a clear 

 white subcostal line. Spot before cleft small, scarcely produced toward costa. 

 Remaining marks as in inquinatus and cros. Fringes contrastingly dark but with 

 extensive white areas. Secondaries whitish to light gray, usually with much 

 more white below than in the other species. Expanse 17-24 mm. 



Described from twenty-seven specimens taken by O. C. Poling en route 

 Dewey to Salome, Ariz., April and May 8-15 and three ( 9 paratypes) from 

 Palm Springs, Riverside Co., Cal., March 16-23. 



Holotype S, allotype and 22 paratypes, 11^, 11 9, in coll. Barnes. 



Paratj-pes S and 9 U. S. N. M. No. 23470. 



Paratypes S and 9 Cambridge Museum. 



Paratype 6 coll. Fernald. 



Paratype 9 coll. Meyrick. 



With these we associate a number of specimens from other locali- 

 ties in Ariz, and S. Cal. 



The species differs from inquiiintus and cros in its larger size, 

 lighter color and the form of the left harpe. This, as pointed out 

 under inquinatus, is rather broadly bent into three regions, the terminal 

 approximately equal to the median. With a good series at our disposal 

 we feel that these differences warrant the treatment of pan as a good 

 species. It is possible that it is Zeller's inquinatus var. b, but the 

 specimen labelled by Zeller in the Cambridge Museum collection is not 

 sufficient to establish this. 



We have no knowledge of the life history. We should expect to 

 find the larvae of eras and pan on Ambrosia with inquinatus or on 

 closely related plants, and hope that some entomologist in the South- 

 west will be able to rear them and ap])ly the evidence of life history 

 to the separation of the three. 



