404 



pan. Wc favor the latter view, but the matter is so unimportant as 

 scarcely to warrant the complication of the synonymy. 



Coc]uilett's brief descriptions of the larva and pupa are the only 

 ones known to us. They are as follows : 



"Larva. — Body green, sparsely covered with raised white dots ; warts con- 

 colorous, each bearing from two to six stiff, curved, diverging white bristles 

 of different lengths; spiracles raised, whitish; head partially retractile into 

 segment one, green, tinged with brown and marked on each side with a black 

 spot above the jaws ; venter green, unmarked ; length 12 mm. Two specimens. 

 Lives on Ambrosia artemisiac folia. One pupated July 27, producing the imago 

 August 3; the other pupated July 30 and the imago emerged August 6. 



"Chrysalis. — Of the usual shape, pale ash color, marked with a large pink 

 spot near the middle of the upper side; on this spot is large brownish-black 

 spot ; length 7 mm. The chrysalis is fastened by its posterior end to the upper 

 side of some object, from which it stands in an oblique direction, the abdomen 

 being slightly curved." 



We have no way of telling whether the species which Coquilett 

 reared was true inquinatiis or ambrosiae Murt. The descriptions 

 quoted by Fernald in the "Pterophoridae of North America" apply to 

 the latter. 



20. OlDAEMATOPHORUS EROS H. Sp. PI. XLVI, fig. 2. PI. LI, fig. 11. 



Head and thorax white, the former with some gray-brown scales above 

 and in front and the latter with a cluster of blackish-brown scales behind. Ab- 

 domen mostly white but with a few gray-brown scales. Posterior margins of 

 segments with paired dorsal dots, as in inqninatus, but with the vestiture not 

 visibly roughened in the type series. Antennae white with gray-brown dots 

 above. Palpi white with scattered gray-brown scales, especially on sides. Legs 

 white, marked as in inquinatus but less heavily. 



The primaries are marked exactly as in inquinatus, but are much 

 lighter. Their appearance is definitely whitish with gray-brown irroration and 

 spots, instead of generally grayish as in the other species. The secondaries are 

 also of a much lighter shade of brownish gray. Expanse 14-17.5 mm. 



Described from ten specimens taken in Mohave Co., Ariz., Sept. 8-15 

 (Poling). 



Holotype $ , allotype and 6 paratypes 3 in coll. Barnes. 



Paratypes 5 and 2 , U. S. N. M. No. 23469. 



The series to which we apply this name is undoubtedly very closely 

 related to inquinatus and pan, and may be only a small pale race of 

 the former. Until we are able to link them definitely with specimens 

 such as we have not at present, we are inclined to believe that it is 

 worthy of specific rank. As one would expect, the genitalia of all 

 three are quite similar, but there is a general form of the left harpe in 



