1911} Study of Muscoid Flies 135 



genera dissected and maggots drawn, but the form of uterus 

 was not determined. 



26. Siphosturmine series — Siphosturmia sp. (Peru) dis- 

 sected. TD 4002. Single-coil uterus, sub-tubular, with two 

 rows of eggs and maggots; very long ovipositor, sub-chitinous, 

 in its unextended position in abdomen measuring nearly one- 

 half the length of uterus; ovaries slender, elongate, with few 

 eggtubes; oviducts long, common oviduct same length as ovi- 

 duct; spermathecae elongate-oval, two joined in hood, the third 

 free; spermathecal ducts elongate, about as long as common 

 oviduct; tubular glands moderately elongate and slender, about 

 as long as common oviduct plus oviduct. Siphosturmia and 

 allies. Florida specimens of the genus have also been dissected. 



27th series — Anisia, Erynnia, Gymnostylia spp., or forms 

 allied to these genera so far as can be known by external adult 

 characters, including Hypostena barbata of Coqt. in part 

 (Peru and Maryland) dissected, TD 4001, 433. Plump white 

 maggots with well-developed spine rows on ventral surface. 

 Uterus slender, tubular, coiled three times within itself; mag- 

 gots in single file, oblique to nearly longitudinal in position 

 according to degree of crowding in uterus; spermathecal ducts 

 long, tubular glands not long; ovaries elongate, with few egg- 

 tubes. The maggots of the Peruvian form (TD 4001) show 

 five highly developed ventral spine rows; those of the D. C. 

 form (TD 433, collected by Knab on Plummers Island follow- 

 ing a beetle of Calligrapha bigsbyana) are very similar, having 

 five transverse rows of strong hooked spines on posterior half 

 of median ventral surfaces. Maggots of TD 352 (Mass.) 

 are short and plump, with strongly marked complete rows of 

 spines encircling the body, and may not belong here ; the fly has 

 a different facies. The series embraces flies that are parasites 

 of both the grubs and adults of certain beetles, especially 

 Chrysomelidae. The European tachinid parasite of the import- 

 ed elm-leaf beetle apparently belongs here. Many genera will 

 likewise have to be dissected before this series can be named. 



28. Parexoristine series — Parexorista cheloniae (Europe) 

 and Parexorista sp. (Mass.) dissected, TD 432. Uterus in a 

 single coil, containing elongate subcylindrical eggs which are 

 furnished with a pedicel, the eggs incubated in uterus sometimes 

 to an advanced stage of the embryo and then deposited on host 

 attached to skin or hairs of latter by pedicel. Parexorista and 

 allies. 



