174 ENTOMOLOGICAL NEWS. [June, 



about the mouth of a drain at Fort Collins. Flies emerged from 

 4-iito5-3. 



Jurinia apicifera Wlk. — This is one of many parasites which 

 help to reduce the numbers of Clisiocampa fragilis, the larvae of 

 which are so enormously abundant on quaking ash and Cerco- 

 carpa in various parts of Colorado. From material brought 

 from Georgetown, by Prof. Gillette, numerous flies emerged from 

 7-30 to 8-2. 



Masicera eufitchicE Twns.' — A common parasite on Tham- 

 nonoma flavicaria and T. ^-linearia at Fort Collins. Flies 

 emerged 7-15 and after. 



Hyphantrophaga hyphantrice Twns. — A single specimen was 

 reared from Vanessa milbertii at Fort Collins, the fly emerging 

 7-19. 



Tachina clisiocampa Twns. — Reared from Clisiocampa ft agilis 

 with Jurinia apicifera. Flies emerged from 7-24 to 8-4. 



Cyrtoneura stabulans Fab. — At Fort Collins in squash roots 

 rotting from the attacks of Anasa tristis; maggots of this fly 

 were found in abundance. Puparia taken from the earth adjoining 

 the roots gave flies from 7-29 to 8-23. 



Oestrus ovis L. — A number of sheep on the college farm died 

 last year from the attacks of this fly. After death occurred, blood 

 and mucous oozed from the nasal cavities and softened the ad- 

 joining earth, otherwise the maggots would have been unable to 

 bore down. Maggots taken from the blood moistened earth and 

 placed in a breeding cage, gave flies about six weeks after. 



Trypeta canadensis Lw. — A very common goo.^jeberry pest in 

 the vicinity of Fort Collins. Infested berries were gathered 

 during the Fall, the maggots passing from them into the earth. 

 The next Spring numerous flies emerged on 4-30. 



Trypeta bigelovii Cockerell. — Galls were found abundant on 

 Bigelovia, at Dolores, by Prof Gillette. Flies emerged 6-29. 



Trypeta solidaginis Fitch. — The galls of this fly are very com- 

 mon on Solidago canadensis in the vicinity of Fort Collins. 

 Flies emerged from 5-7 to 5-23. A single Eurytoma gigantea 

 Walsh (determined by Mr. Ashmead) was also obtained from 

 the galls. 



The above are a few out of a considerable number of flies 

 reared in Colorado, for the greater part of which it has been 

 impossible to obtain names. 



