NEW MUSCOID FLIES FROM THE ANDEAN MONTANYA 1 1 



siinae are to be distinguished by their tubular and not straplike uterus, as 

 well as usually by the characters of the cephalopharyngeal skeleton and 

 sometimes the integumental platelets of the first-stage maggot. In this 

 connection it is important to note that a very peculiar dolichocephaly pre- 

 vails in several groups of muscoid flies in the high Andean altitudes. The 

 oral profile is especially elongated, the epistoma being much produced. 

 It is to be noted also that the costal spine is usually very long. These 

 characters are found in Andinomyia, which is proved by dissection 

 (TD41 17, 4124) to belong to the Hystriciidae on its straplike uterus; 

 in a new genus of Masiceratidae belonging in or near the Salmaciinae ; 

 and in various types of Pyrrhosiinae, as Trichophoropsis, Echinopyrr- 

 hosia, Dolichostoma, etc., all shovsong tubular or subtubular uterus in 

 contrast to straplike. Until they were dissected these Pyrrhosiine types 

 were supposed to be Hystriciidae. Oestrohystricia is another example 

 of high Andean dolichocephaly, and may belong to the Pyrrhosiinae. 

 Many of the forms herein described were at first wrongly referred by me 

 to the Hystriciidae, but several were found on dissection to show a tubu- 

 lar uterus and this discovery led to a critical comparison of the external 

 adult characters of all the forms possible and dissection of such cis were 

 available in the female. It was found that the Trichophora and Cope- 

 crypta groups show Pyrrhosiine affinities on their tubular uterus, and it 

 is thus seen that Brauer and von Bergenstamm rightly included them in 

 their Pyrrhosiidae. Bomb^Iiomyia and Melanophrys seem to belong to 

 the Pyrrhosiinae on first-stage maggot characters. Probably the genera 

 Corpulentosoma, Eur^thiopsis, Huascaraya, Fahriciopsis, Euh^stricia, 

 Eucorpulentosoma, and Epalpellus will be found on dissection to be 

 Pyrrhosiine, and I have so placed them in this paper. Eujurinella and 

 Hystriciopsis show a tubular uterus, as does a species which I refer to 

 Parepalpus (TD3949 — Uruhuasi). Dolichostoma, described by me 

 in 1 9 1 2 as a Hystriciid, is now found on dissection to be Pyrrhosiine 

 (TD4122). It is probable that Oestrohystricia and Ecuadorana wiW 

 be found to have tubular uterus. From what has been said it is at least 

 apparent that extremely close similarities exist between these colored mag- 

 got and spinelike macrochaetae groups of Pyrrhosiine flies and the fcimily 

 Hystriciidae. The question is where is the line of separation to be 

 drawn. Do the forms with projected epistoma and tubular uterus prop- 

 erly belong with the P'^rrhosiinae, or is the epistomal character of greater 

 weight than the type of the uterus ? These questions can only be 



