January iSgii.] 



PSYCHE . 



329 



for the Lyniantriidae ; three above the stig- 

 matal wart on joints 3 and 4; wart i mod- 

 erately large on abdomen ; wart iv verj 

 small, behind the spiracle; leg plates dis- 

 tinct. Dorsal eversible areas on joints 10 

 and II normal, whitish, more or less con- 

 cealed by the hair, often completely so. 

 Body black with a frosty gray shade; hair 

 thick, all barbuled, some heavily feathered 

 but none pUimed. Tufts from warts i on 



joints 5 to 9 and 12 a little more closely 

 bunched, but no true tufts and no pencils. 

 Hair gray, mixed with black, with bright yel- 

 low hairs on the lower side of wart ii on 

 joints 5 to 13 and at the bases of all the hair 

 bunches on the thorax. Subventral hair 

 bunches small. The gray hairs are densely 

 feathery on warts i to v, the black and yel- 

 low ones only spinulose. Hair not very 

 long, quite even but not regularly so. 



NOTES ON THE SPECIES OF EXORISTA OF TEMPERATE 



NORTH AMERICA. 



BY C. 



TYLER TOWNSEND. 



The following twelve species of Rxo- 

 rista all belong to the middle ;ind 

 eastern United States with one excep- i 

 tion, E. lagoae being from Gnanajuato 

 on the Mexican tableland. They com- 

 prise all the species that I have so far 

 been able to recognize from the tem- 3 

 {Derate portions of North America. 

 None of the twenty-seven Mexican 

 species described by Mr. v. d. Wiilp 

 are included. They mostly belong to 

 the neotropical fauna. I am under 3. 

 many obligations to Mr. S. H. Scudder 

 for sending me, some years ago, the 

 types of the dipterous parasites men- 

 tioned in his Butterflies of the Eastern 

 United States and Canada. It was a 4. 

 study of these, and comparison of them 

 with other types which I then possessed, 

 that enabled me to prepare the follow- 

 ing table of E.xorisla, as well as a 

 similar one of the allied genera A/as/- 5- 

 cera and Phorocera. I have examined 

 all the species mentioned in the tabic. 



LAS CRUCES, N. MEX. 



Table of Species. 



Palpi wholly black or dark brown- 

 ish ..... 2 



Palpi wholly or parth \eilow or 

 rufous yellow ... 5 



Second abdominal segment with 

 Ijoth discal and marginal macro- 

 chaetae . . . . ^ 



Second segment w ith only margiii.al 

 macrochaetae . . 4 



Anal segment imusnalh- bristly, 

 rather strongly and thickly so 



liirsuta 



Al)domen with only the usual 

 bristles . . nigripalpis 



Anal seginent brassy yellow polli- 

 nose .... fiitilis 



Abdomen shining black and silycr\', 

 without brassy pollen on anal 

 segment . . t/teclartni/ 



Second and third segments with both 

 discal and marginal macrocliaetae 

 6 



