TITLES. 
Ins. 49 
878. Ormerod, E. A. Observations of injurious insects and common farm 
pests during the year 1899 with methods of prevention and remedy. 
Twenty-third report. Second series No. 1. London, 1900, 8vo. 
879. Ostwald, W. Experimental-Untersuchungen iiber den Kocherbau 
der Phryganeidenlarven. Zeitschr. Naturw. lxxii, pp. 49-86. [Tricho- 
ptera.] 
880. Oudemans, J. T. Triehiosoma lucorum L. Eene biologische Studie. 
Tijdschr. Ent. xlii, pp. 223-242, pi. xiv. [ Hymenoptera. ] 
881. Pandelle, L. Etudes sur les Muscides de France (3 e partie), suite, 
pp. 81-220. [Diptei'a.'] 
Published in connection with Rev. Ent. franc, xviii, with special pagina¬ 
tion. Not really confined to species of France. 
882. Paravicini, G. Incrisalidamento d 5 una Saturnia pyri senza bozzolo. 
Boll. Scient. xxi, pp. 75-79. [ Lepidoptera .] 
883. Parrott, P. J. New Coccids from Kansas. Canad. Ent. 1899, 
pp. 280-282. 
884. -. Aspidiotus ( Targionia) helianthi , sp. nov. T. c. p. 176. 
\Coccidce.'\ 
——. [See also Cockerell & Parrott (241).] 
885. Paulcke, W. Zur Frage der parthenogenetischen Entstehung der 
Drohnen (Apis mellif. <£). Anat. Anz. xvi, pp. 474-476. [Hymeno- 
ptera.\ 
Summary Zool. Oentrlbl. vii, p. 162. 
886. Perez, C. Sur une Coccidie nouvelle ( Adelea mesmli, n. sp.), 
parasite ccelomique d’un Lepidoptere. Bull. Soc. ent. France 1899, 
pp. 275-277. 
887. -. Sur la metamorphose des insectes. T. c. pp. 398-402. 
888. Perez, J. Trois Megachiles nouvelles du Chili. Revist. Chilena iii, 
pp. 105-109. [Hymenoptera.'] 
889. PfcRiNGUEY, L. Fifth contribution to the South African Coleopterous 
fauna. Ann. S. African Mus. i, pp. 240-330, pis. vi, vii. 
890. - - . A contribution to the knowledge of South African Mutillidce. 
T. c. pp. 352-378, pi. viii (for amended description of pi. viii, see 
p. 451). [Hymenoptera.] 
891. -. Description of twelve new species of the genus Mutilla in the 
South African Museum. T. c. pp. 439-451. [Hymenoptera^] 
892. Perkins, R. C. L. On a special Acarid chamber formed within the 
basal abdominal segment of bees. Ent. Mag. 1899, pp. 37-39. 
[ Hymenoptera. ] 
893. -. Crahro cavifrons Thom., C. planifrons Thom., C. chrysostomus 
St Farg., and C. saundersi m. T. c. p. 260. [ Hymenoptera .] 
894. -. Description of two new species of Rhyncogonus ( Otiorhynchini). 
T. c. pp. 56, 57. [ Coleoptera.] 
895. -. Hymenoptera Aculeata. Fauna Hawaiiensis i, pp. 1-115. 
Cf. Sharp, D.—Summary by Dalla Torre, Zool. Centrlbl. vi, pp. 667- 
672. 
896. -. Orthoptera. Fauna Hawaiiensis ii, pp. 1-30, pis. i, ii. 
897. -. Neuroptera. T. c. pp. 31-89, pis. iii-v. 
1899. [VOL. XXXVI.] E 4 
