Protozoa 25 1 



in the vicinity of Denver, but it is quite possible that a few speci- 

 mens might be accidentally brought in on trains from Texas. The 

 parasites were demonstrated by Dr. Forbes in the baby's blood, 

 but also in that of the mother, a Greek woman who had a severe 

 case of malarial fever five years ago in Greece. The question 

 thus arises, could the baby have been infected through the placenta 

 of the mother, or was it bitten by some accidentally imported 

 mosquito? 



Another group of Sporozoa is the Gregarinidae, parasitic in 

 insects and other arthropods. In 1911 we remarked that they 

 were doubtless numerous with us, "but none have been examined." 

 A few years later Dr. Max M. Ellis took up the study of Colorado 

 gregarines, and had no difficulty in finding a series of species, 

 several of them new to science. Stylocephalus giganteus Ellis 

 was found to be common in Tenebrionid beetles. Amphorocepha- 

 lus amphorellus Ellis was found in the great centipede, Scolopendra. 

 Gregarina termitis of Leidy was recorded from Termes lucifugus, 

 but we now know that the termite was really Reticulitermes 

 tibialis of Banks. Gregarina rigida of Hall was seen to be quite 

 common in Melanoplus and other grasshoppers. G. consobrina 

 Ellis was discovered in the orthopteran Ceuthophilus, taken in 

 Boulder Canyon. Stcnophora robusta Ellis occurred in diplopods 

 at Boulder and Gold Hill. Although Dr. Ellis thus met with 

 remarkable success in his search for gregarines, he did not more 

 than begin to reveal the richness of our fauna in these parasites. 

 Future workers, who will examine the alimentary canals of numer- 

 ous insects, centipedes and myriapods, will undoubtedly make 

 many additions to the list. 



There are other Sporozoa which will certainly be found when 

 looked for. For instance the genus Nosema, of the Microsporidia, 

 exists in numerous species in many kinds of insects. It is Nosema 

 bombycis of Naegeli which produces the famous pebrine disease of 

 silkworms, studied by Pasteur. Some of the species exist else- 

 where in genera of insects which are common in Colorado, but 

 no one has searched for them here. 



SARCODINA 



These may be naked, as in the Amiba, or covered with a 

 shell, as in numerous other genera. The common amoeba, found 



