DIPTERA — MUSCINA. 



139 



the house fly in the spreading of typhoid fever has caused special effort to 

 be put forth to prevent their breeding in stable manure. See California Bulle- 

 tin No. 21.5. 



SYNOPSIS OF GENERA. 

 Lucilia: proboscis not elongate and row of vertical bristles above hind leg 

 Pollenia and Chrysomyia: vibrissal angles distant from oral margin, the latter 

 bright metalic flies. Phormia: mesonotum flattened behind transverse suture. 

 Calliphora: cheeks hairy. 



Musca: proboscis not elongate. Pyrelia and Pseudopyrelia: middle tibiae 

 with a prominent bristle on the inner surface beyond the middle, the latter 

 with angle of fourth vein rounded. Myiopsila, Morelia and Muscina: last sec- 

 tion of fourth vein only broadly curved, the first with eyes pubescent, the 

 last with first posterior cell broadly open. 



Stomoxus. Haematobia: palpi nearly as long as proboscis. 



Figure 149 Effect of quantity of food on size. 



Calliphora coloradensis Hough. 



vomitoria (Linn.) 

 Chrysomyia marcellaria Fabr. 



wheeleri Hough. 

 Conops calcitrans — Stomoxys. 

 Haematobia serrata Desv. 

 -ucillia caesar (Linn.) 



proxima (Walk.) 



sericata Meig. 



stigmatlcollis — Phorma regina. 

 Musca caesar — Lucilia. 



cornidina — Pseudopyrellia. 



domestica Linn. 



proxima — Lucilia. 



regina^ — Phormia. 



rudis — Pollenia. 



vomitoria — Calliphora. 

 Morellia micans Macq. 

 Muscina recurva Thom. 

 Myospila medilabunda Fabr. 

 Nitellia glabricula — Pollenia. 

 Phorma regina Meig. 

 Pollenia glabricula Big. 



rudis (Fabr.) 

 Pyrellia frontalis Thom. 

 Pseudopyrelia cornicina (Fabr.) 

 Stomoxys alcitrans (Linn.) 



SARCOPHAGID/E. 



The members of this family are called flesh flies. The larvse feed on all 

 kinds of decaying matter. 



Sarcophaqa davidsonii Coq. palliventris Thom. 



orpifera Coq. 



