XIV Journal of Agricultural Research voi.xvca 



Page 



Plate 52. Sorosporella uvella: A. — Portion of a fat body from an infected 

 insect which is being destroyed by an adhering group of yoimg resting 

 spores. B, C. — Phagocytes from an infected cutworm with blastocysts of 

 the fungus imbedded in them. D, E. — Phagocytes distorted in form and 

 partially disintegrated as a result of the action of the enclosed blastocysts. 

 F. — The terminal portion of a complexly branched hypha from nutrient 

 agar, showing sterigmata and conidia. G. — Normal blood corpuscles of 

 Feltia jaculifera. H. — Resting spore germinating on nutrient agar, show- 

 ing hypha;, some of which are producing resting spores. I. — Blastocysts, 

 showing method of reproduction . J . — An aggregation of cohering leucocytes 

 in the substance of some of which blastocyets are to be seen. K. — Portion 

 of the intestine of an injected Feltia jaculifera, showing longitudinal and 

 transverse muscles connected by a frail membrane within the folds of which 

 blastocysts may be seen. L. — Colony of young resting spores from a culture 

 which are giving rise to hyphae. M. — Colony from a Petri dish culture, 

 showing a mass of young resting spores, some of which have germinated in 

 situ by giving rise directly to sterigmata and conidia, and others that are 

 producing hyphse. N. — Small phagocytic complex. O. — Portion of one 

 hypha rising from a resting spore that had germinated in a Petri dish cultiu-e, 

 showing sterigmata and conidia 440 



Plate 53. Sorosporella uvella: A. Photomicrograph of a stained blood smear 

 from an infected cutworm, showing a number of free-floating blastocysts 

 and one leucocyte within which are to be seen two blastocysts. B. — Photo- 

 micrograph of a water mount of blastocysts which developed on Uschin- 

 sky 's medium after inoculation 440 



Plate 54. Sorosporella uvella: A. — General appearance of the thallus when 

 grown on Molisch's medium, showing brainlike convolutions and crateri- 

 form structure. B. — Streak culture upon beerwort agar, showing shiny 

 gelatinous-appearing, grapelike bunches of mature resting spores, some of 

 which are germinating 440 



Plate 55. Sorosporella uvella: A. -^Infected larva of Feltia sp. torn open, 

 showing Isaria-like fascicles of conidiiferous hyphae that sometimes develop 

 when the resting spores are allowed to germinate in a moist chamber. 

 B. — Photomicrograph of a stained cross section of the heart, within the 

 cavity of which numerous blastocysts are to be seen 440 



Plate 56. Sorosporella uvella: A, B. — Photomicrographs of phagocytic com- 

 plexes, showing blastocysts incorporated in the substance of the phagocytes. . 449 



European Frit Fly in North America 

 Plate 57. Oscinis frit: A. — Adult. B. — Puparium 474 



Life History op Eubiomyia calosomae, A Tachinid Parasite of Calosoma 



Beetles 



Plate 58. Eubiomyia calosomae: A. — Egg. showing flat side and exit hole 

 of larva. B. — Mouth hook of third-stage larva. C. — Third-stage larva 

 after preservation in alcohol. D. — Adult of Calosoma sycophanta con- 

 taining two second-stage or hibernating larvae of Eubiomyia 498 



Plate 59. Eubiomyia calosomae: A. — Puparium. B. — Anal stigmata of 

 puparium from slide mount. C. — Section of spine area on segment of 

 pupariiun. B. — Adult female 498 



