

Insecutor Inscitiae Menstruiis 



Vol. IV JULY-SEPTEMBER. 1916 Nos. 7-9 



SOME NEW NORTH AMERICAN MUSCOID FORMS 



By CHARLES H. T. TOWNSEND 



A few forms of muscoid flies, mostly of direct economic 

 importance, are characterized below. All are from the eastern 

 and southern United States, one occurring in Cuba. 



Juriniopsis, new genus. 



Genotype, Juriniopsis floridensis Townsend, new name for 

 Miisca hystrix Williston (nee Fabricius) p.p., 1886, Trans. 

 Am. Ent!^ Soc, XIII, 299, Florida. Holotype, No. 20307 U. 

 S. Nat. Mus., female; TD1187, Miami, Fla. (Det. Coqt. as 

 Jurinia adust a) . 



This form may be recognized by the following structural 

 characters : Eyes bare. Male with two rows of frontal bristles, 

 and with reclinate fronto-orbitals. Female with one row of 

 frontals, and both proclinate and reclinate fronto-orbitals. 

 Third antennal joint hardly as long as second. First aristal 

 joint not elongate. No discal macrochsetse on intermediate ab- 

 dominal segments ; male with marginal row of second segment 

 normally complete, female with same interrupted laterally ; 

 marginal rows very thickly set ; anal segment covered with 

 spines that are nearly as heavy. Female front tarsi greatly 

 widened. 



Owing to the fact that a number of closely similar forms 

 exist in the eastern and southeastern United States, it is im- 

 possible to identify this species with any of the various super- 

 ficial descriptions of Drury, Desvoidy, Macquart, or Jaennicke. 

 Williston was the first to describe the form by recognizable 



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