The Microscope and Biology. By W. Wesche". 419 



laid eight eggs in the thorax, where they [can still be seen in 

 situ. 



SciomyziD/E. — Tetanocera Icevifrons Lw. is quite filled with 

 digested food, and the lower part of the intestine shows much 

 black stain. 



Ortalid^e. — Ptcropcectria nigrina Mg., Seoptera vibrans L., and 

 Ulidia nigripennis Lw., show the black granular remains, but no 

 undigested food. 



TRYPETiDiE. — Acidia lychnidis F. shows pollen, and the intes- 

 tine is much stained with black. 



Tephritis formosa Lw. £ has a particularly long intestine, 

 much coiled, and full of nearly digested food. 



Lonch^eid^e. — Lonchcea nigrimana Mg. is full of pollen, and 

 all the members of this small family are flower haunters. 



Sapromyzid.e. — The flies of this family are mostly full of debris 

 of various kinds, with large fragments of black or chitinous-looking 

 material. It is interesting that a Lauxania from New Zealand has 

 an identical appearance. 



In addition to this, Sapromyza fasciata Fin. shows the spores 

 so often met with. Another undetermined Sapromyza also shows 

 a number of spores. 



The debris in Lauxanca mnea Fin. is large, and there are some 

 crystals. \ 



L. bilineata Hutton (N.Z.) also shows a similar type of digested 

 food. Some of the crystals in L. decora Schiner (S. Australia) are 

 green. 



Sepsid^e. — Sepsis cynipsea L. shows the usual black granular 

 stain and some digested food. 



Ephydrid^e. — Parhydra coarctata Fin. has varying appearances ; 

 one shows a very fine mass of conglomerate, with larger pieces of 

 chitin (?), and others black in colour and angular in form. Another 

 quite different, rather like dried blood. A third with the intestine 

 full of conglomerate. 



Scatophila despecta Hal. shows many diatoms, Pinnuliaria and 

 Navicula. 



Borborid^e. — Borboras equimts L., male and female, both show 

 a large granule and reddish nodules in the intestine. 



B. genicidatus (?) Mg. $ shows some very minute reniform 

 granules, besides the usual mass. 



Limnosina fuscipennis Hal. has all the abdomen full of larger, 

 milky white, kidney-shaped pollen. 



Phorid^e. — Phora riifipes Mg. $ shows the cracked dried-up 

 appearance that I associate with albumen. There is little doubt 

 that some of these flies are predaceous. An undetermined Phora 

 from New Zealand also shows this appearance in both sexes. 



HippoBOSCiDiE. — A Nycteribid shows blood in quite an un- 

 digested state (N. Hermanni Leach). 



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