1913] Observations on Chcetotaxy of Calliphorinae. 265 



records of chaetotaxy of the wild Calliphorae that was taken 

 at Bussey are as follows. The bristles observed are the post- 

 achrosticals and post-dorso-centrals as in Lucilia. 



C. erythrocephala: 



33 cf c?— 3, 3, 3, 3. « 134 9 9—3,3,3,3. 



19 — 3, 3, a ! be, 3. 1 9 —2, 3, 3, 3. 

 C. vomitoria: 



2 cfcf— 3, 3, 3, 3. 54 9 9—3,3,3,3. 

 C. viridescens: 



219 9—3,3,3,3. 19 — 3, ab, 3, 3. 



These records show 3 abnormals out of 247, but the ratio 

 is not very significant as the numbers are very small. 



The records of breeding Calliphorae show rather interesting 

 results. 



A 9 erythrocephala — 3, 3, 3, 3, gave: 



54 c^ d^— 3, 3, 3, 3. 47 9 9—3,3,3,3. 



2 cf cf— 3, a !bc, 3, 3. 



One of these abnormal males was mated to his sister and the 

 pair gave the following offspring: 



131 c^cf— 3. 3, 3, 3. 86 9 9—3,3,3,3. 

 1 cf —3, (c), 3, 3, 3. 19 —3, a ! be, aabc, 3. 



4 cf d"— 3, a ! be, 3, 3. 5 9 9—3,-3, a ! be. 3. 



1 d" —3, a ! be, a ! be, 3. 1 9 —3, 3, 3, ab. 



8 cfd'— 3, 3, a ! be, 3. 



1 d" —3, ab, 3, 3. 



Another wild 9 erythrocephala — 3, 3, 3, 3, gave: 



80 d'c^— 3, 3, 3, 3. 74 9 9—3,3,3,3. 



Another wild 9 erythrocephala — 3, 3, 3, 3, gave: 



97 c^cf— 3, 3, 3, 3. 97 9 9—3, 3, 3, 3. 



2 9 9—3, 3, ac, 3. 



A 9 vomitoria — 3, 3, 3, 3, gave: 



47 cfc?— 3, 3, 3, 3. 64 9 9—3,3,3,3. 



4 cfcf— 3, ac, 3, 3. 4 9 9—3, ae, 3, 3. 



2 o'cf— 3, 3, ac, 3. 4 9 9—3, 3, ae, 3. 

 1 o" —3, 3, ab, 3. 19 —3, 2, 3, 3. 



1 cT —3, 3, 2, 3. 

 Another 9 vomitoria — 3, 3, 3, 3, gave: 



32 c^d^— 3, 3, 3, 3. 64 9 9—3,3,3,3. 



Id' — ab, 3, 3, 3, 2 d'd'— 3, a ! be, 3. 3. 



1 <d —3, 2, 3, 3. 1 9—3, ./ abe, .' abe, 3. 



1 & —3, 2, 2, 3. 

 A 9 viridesceyis — 3, 3, 3, 3, gave: 



5 cfd^— 3, 3, 3, 3. 5 9 9—3,3,3,3. 



1 (^ —3, 2, 3, 3. 19 —3, ac, 3, 3. 



Another 9 viridescens — 3, ab, 3, 3, gave: 



4 d'd'— 3, 3, 3, 3. 6 9 9—3,3,3,3. 



1 d^ — 3, ac, ae, 3. 

 The totals of the bred stock for the three species are: 



450 c^d'— 3, 3, 3, 3. 443 9 9—3,3,3,3. 



By reduction 14 d'd' and 4 9 9 , or 2%; by addition 18 d'd" and 12 9 9 or 3%. 



