25 Insecla. 
Titles. 
• 3500 
Cockerell, T. D. A. vide Lutz and 
Cockerell. 
Codina, D. A. Lista in^dita de 
Homopteros [Homfpteros] do Cataluna. 
i. Bol. Soc. ent. Espana Zaragoza 3 
1920 (100-104). 406 
Cole, P. R. Notes on the lunato 
onion -fly, Eumerus strigatus ( Diptera , 
Syrphidae). Ent. News Philadelphia 31 
1920 (31-35). 407 
Collier, — . Biochemischo Fost- 
stellung dor Verwandschaft bei Insck- 
ten. Zcitschr. wiss. Insbiol. Berlin 16 
1920 (1-5). 408 
Collin, J. E. Eumerus strigatus 
Fallen and tuberculatus Rondani ( Di- 
ptera Syrphidae). Ent. Mo. Mag. 
London 56 1920 (102-106) pi. iii. 409 
Collin, J. E. Tho British species of 
the sylvalicus-group of Pipunculus. 
Ent. Mo. Mag. London 56 1920 (270- 
275). [Diptera.] 410 
Collinge, W. E. Tho food of the Night- 
jar ( Caprimulgus europaeus, Linne). 
Journ. Ministry Agric. London 26 1920 
(992-995). 411 
Collins, C. W. and Hood, C. E. Life 
history of Eubiomyia calosomae, a 
tachinid parasite of Calosoma beetles. 
J. Agric. Res. Washington 18 1920 (483- 
498) 2 pis. [Diptera.] 412 
Comstock, J. H. An introduction to 
entomology. Part i. 2nd edit. Ithaca 
1 920 (xviii + 220). 413 
Comstock, W. P. vide Watson and 
Comstock. 
Cook, W T . C. Studies on tho flight 
of nocturnal Lepidoptera. Rep. ent. 
Minnesota 18 St. Paul 1920 (43-56) 
pis. vi & vii. 414 
Coolidge, K. R. and Newcomb, H. H. 
Richard H. Stretch — an appreciation. 
Ent. NeAvs Philadelphia 31 1920 (181- 
185) portrait. 415 
Corbett, G. H. Observations on 
cotton thrips in tho Geziia, Blue Nile 
provinco, Sudan, in 1918-19. Bull, 
ent. Res. London 11 (95-100). [Thy- 
sanoptera.] 416 
Constantini, A. Note su Lepidofteri 
dell’ Emilia. , Atti Soc. Modena 5 1920 
(1-9). 417 
Cotte, J. Teneur en cantharidino 
du certains Myldbris. C. R. Soc. Biol. 
Paris 83 1920 (106-108). [Coleoptera.] 
418 
Cotterell, G. S. The life-history and 
habits of tho yellow dung-fly ( Scato - 
phaga ster cor aria) ; a possible blow- 
fly check. With a preface by Prof. 
Maxwell Lefroy, F.Z.S. Proc. zool. Soc. 
London 1920 1920 (629-647). [Diptera.] 
419 
Cotton, R. T. Rice Weevil ( Calandra ) 
Sitophilus oryza. J. Agric. Res. 
Washington 20 1920 (409-422) pi. lx. 
[Coleoptera.] 420 
Cotton, R. T. Tamarind pod-borer, 
Sitophilus linearis (Herbst.). J. Agric. 
Res. Washington 20 1920 (439-446) 
pi. lxi. [Coleoptera.] 421 
Couvreur et Clement. Difficult^ do 
produire la retention do la soio chez lo 
B. mori. C. R. Soc. Biol. Paris 83 1920 
(1430). [Lepidoptera.] 422 
Couvreur et Clement. Essais de 
coloration de la soio du B. mori avant 
le filage du cocon. C. R. Soc. Biol. Paris 
83 1920 (1431). [Lepidoptera.] 423 
Cragg, F. W. Further observations 
on the reproductive system of Cimex, 
with special reference to the behaviour 
of tho spermatozoa. Indian J. Med. 
Res. 8 1920 (32-79) pis. v-xii text-figs. 
1-4. [Iiemiptera.] 424 
Cragg, F. W. Secretion and epi- 
thelial regeneration in the mid-intestine 
of Tabanus. Ind. J. Med. Res. 7 
1920 (648-663) pis. lxi-lxiii text-fig. 
[Diptera.] 425 
Cragg, F. W. The distribution of 
tho Indian spocies of tho genus 
Xenopsylla, with reference to the im- 
munity of certain areas from plague 
epidemics. Indian J. Med. Res. 
Spocial Ind. Sci. Congress No. 1920 
(29-34). [Siphonaptera.] 426 
Craighead, F. C. Biology of some 
Coleoptera of tho families Colydiidae 
and Bothrideridae. Proc. ent. Soc. 
Washington 22 1920 (1-13) 2 pis. 427 
Craighead, F. C. Direct sunlight as a 
factor in forest insect control. Proc. 
ent. Soc. Washington 22 1920 (106- 
108). 428 
