THE CANADIAN ENTOMOLOGIST. o3 



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postmargiDai vciu very nearly as long as the marginal ; abdomen aeneous 

 black, tinged with metallic green basally at the sides, ovate, somewhat 

 pointed at apex^ very little longer than the thorax. 



Type.— Cat. No. loio, U. S. N. M. 



Host. — Hym.: Isosoma eremitum, Portschinsky. 



Hab. — Oufa, Russia. Described from a single specimen, received 

 from Mr. Ivan Vassilief, of St. Petersburg. 



Two of the Russian joint-worms described by Portschinsky, namely, 

 Isosoma apteruin and T. eremiium, should be relegated to the genus 

 Pkilachyra, Haliday. 



CONCERNING GASTROPHILUS EPILEPSALIS, FRENCH. 

 Mr. Washburn's note in the November number (p. 320) induces me 

 to state that Gastrophilus epi/epsalis, French, is no Gastrophilus at all ; 

 in fact, not the larva of an Qistrid. The figure shows that it is a Muscid 

 larva, very probably of Ca/Iiphora, certainly so if the figure is correct. 

 The species cannot be identified until more of these forms are reared. 

 French's figure indicates that it is very close to the European C. voviitoria 

 as figured by Piepers. There is no definite character known to identify 

 CEstrid larvae, but the larvte of some Muscida^ can be separated from the 

 QsstridcC. The larvae of Calliphora differ somewhat in the structure of 

 the mouth from any known CEstrid larvfe. That Prof Washburn had a 

 Gastrophilus is quite possible from the habits ; but it is not the G. 

 epilepsalis, French. - Nathan Banks. 



CORRESPONDENCE. 



Sir, — Please insert the following addition to my paper on Isodontia, 

 published in the Canadian Entomologist for October, 1903 (p 271): 



Isodontia macrocephala, var. cineiea. Described from four specimens 

 taken at Enterprise, Fla.; Columbia, S.C.; Texas, and one without locality. 

 These cotypes are in the collections of the U. S. National Museum, 

 American Entomological Society, Mass. Agricultural College, and Dr. W. 

 H. Ashmead, the collections from which I received them. 



H. T. Fernald. 



