115 



of subtertian at the same temperature (about 23°-31° C. = 73°-87°F.). 

 The quartan cysts, which from the beginning are smaller than those 

 of subtertian, grow less quickly. It is not possible to distinguish 

 between quartan and subtertian cysts by means of the pigment only, 

 as the differences in it are too imimportant and too inconstant. In 

 both, the pigment fades and diminishes when the cysts grow larger ; 

 it then changes from coarse to fine. A period of captivity lasting 

 longer than usual, involving a more advanced age, lessens the 

 susceptibility of A. ludloici to quartan infection and delays the growth 

 of the quartan cysts ; it does not lessen the susceptibility of the 

 mosquito to subtertian malaria and only slightly delays the growth 

 of the subtertian cysts. 



Martini (E.). Ueber Stechmiicken- und Kriebelmiickenzucht. [The 

 artificial Breeding of Mosquitos and Simuliids.]— /IrcA. Schiffs- u. 

 Trop.-Hyg., Leipsic, xxv, no. 4, April 1921, pp. 120-121. 



Methods for breeding Aedcs larvae, for feeding those of Anopheles 

 and Stegomvia, and for breeding Simuliids, are briefly described. It 

 is stated that Stegomyia fasciata and A. plmnbeus {nigripes) are the 

 most suitable species of mosquitos for breeding in the laboratory. 



SiKORA (H.). Ueber die Ziichtung der Rickettsia pediculi. [The 

 Breeding of Rickettsia pediculi.] — Arch. Schiffs- u. Trop.-Hyg., 

 Leipsic, xxv, no 4, April 1921, pp. 123-124. 



Laboratory methods of breeding Rickettsia pediculi, the harmless 

 micro-organism found in the stomach in lice, are described. R. 

 prowazeki, found in the epithelial cells of the stomach in lice, is the 

 causal agent of typhus. 



Bogdanova-Katkova (L. I.) KpaiKifi npeABapmenbHbiM Otmbttj o 

 Pa6oTax-b QHTOMonornHecKaro OiAt/ia bi> 1916 rofly. [Brief 



preliminary Report of the Work of the Entomological Department 

 in 1916.]— 3anMCKM 3HTOMOJiorMHecKaro OiAtna HMHonaeBCKoii 



OnblTHOti CiaHLliM [Bull. Ent. Dept., Nikolaevsk Expt. Sta.], 

 Petrograd, pt. 1, 1918, pp. 43-61, 3 figs. 



[Received 13th May, 1921.] 



The blood-sucking and other flies recorded in this report include 

 Haematopota pluvialis, L., //. crassiconu's, Wahlb., Tabanus tarandinus, 

 L., T. tropicus, Panz., T. fulvicornis, Meig., T. montanus, Meig., 

 T. solstitialis, Lunb., T. luridus, Fall., T. confinis, Zett., T. bovinus, L., 

 Hypoderma hovis, L., Gastrophilus intestinalis DeG. {cqiii, CI.), 

 Stomoxys calcitrans, L., and Miisca domestica, L. 



Phibbs (G. B.). Variations in the segmental Spines of the fourth- 

 stage Larva of Hvpoderma bovis.— Irish Naturalist, Dublin, 

 XXX, no. 5, May 1921, pp. 53-57, 4 figs. 



The observations here described show that the number and character 

 of the spines of the larva of Hypoderma bovis cannot be taken as an 

 indication that more than four larval stages occur. 



