LITERATURE 419 
Davis, H. 1879. Notes on the Pygidia and Cerci of Insects. Journ. R. 
Micr. Soc., vol. 2, pp. 252-255. 
Kraatz, G. 1881. Ueber die Wichtigkeit der Untersuchung des mann- 
lichen Begattungsgliedes der Kafer fur die Systematik und Artun- 
terscheidung. Deuts. ent. Zeits., jhg. 25, pp. 113-126. 
Dewitz, H. 1882. Ueber die Fithrung an den Korperhangen der Insecten. 
Berlin ent. Zeits., bd. 26, pp. 51-68, fig. 
Gosse, P. H. 1882. On the Clasping Organs ancillary to Generation in 
certain Groups of the Lepidoptera. Trans. Linn. Soc. Zool., ser. 
2, vol. 2, pp. 265-345, 8 pls. 
Von Hagens, D. 1882. Ueber die mannlichen Genitalien der Bienen-Gat- 
tung Sphecodes. Deuts. ent. Zeits., jhg. 26, pp. 209-228, taf. 6,.7. 
Radoszkowski, 0. 1884. Reévision des armures copulatrices des males du 
genre Bombus. Bull. Soc. Nat. Moscou, t. 49, pp. 51-02, 4 pls. 
Saunders, E. 1884. Further notes on the terminal segments of Aculeate 
Hymenoptera. Trans. Ent. Soc. London, pp. 251-267. 
Haase, E. 1885. Ueber sexuelle Charactere bei Schmetterlingen. Zeits. 
Ent. Breslau, n. f., bd. 9, pp. 15-19; bd. Io, pp. 36-44. 
Radoszkowski, 0. 1885. Reévision des armures copulatrices des males de 
la famille des Mutillide. Hore Soc. Ent. Ross., t. 19, pp. 3-49, 
9 pls. 
Von Ihering, H. 1886. Der Stachel der Meliponen. Ent. Nachr., jhg. 12, 
pp. 177-188, taf. 8. 
Goossens, T. 1887. Les pattes des Chenilles. Ann. Soc. ent. France, sér. 
6, t. 7, pp. 385-404. pl. 7. 
Graber, V. 1888. Ueber die Polypodie bei Insekten-Embryonen. Morph. 
Jahtb., bd: 13, pp. 586-615, tat. 25, 26: 
Haase, E. 1889. Ueber Abdominalanhange bei Hexapoden. Sitzb. Gesell. 
naturf. Freunde, pp. 19-20. 
Haase, E. 1889. Die Abdominalanhange der Insekten mit Berticksichti- 
eung der Myriopoden. Morph. Jahrb., bd. 15, pp. 331-435, taf. 
14,005. 
Radoszkowski, 0. 1889. Révision des armures copulatrices des males de 
la tribu des Chrysides. Hore Soc. Ent. Ross., t. 23, pp. 3-40, pls. 
1-6. 
Beyer, 0. W. 1890. Der Giftapparat von Formica rufa, ein reduziertes 
Organ. Jenais. Zeits. Naturw., bd. 25, pp. 26-112, taf. 3, 4. 
Carlet, G.' 1890. .Mémoire sur le venin et l’aiguillon de l’abeille. Ann. 
SC aldtyZlool, sen 7) 1.0, pps I-17, pl, I. 
Packard, A. S. 1890. Notes on some points in the external structure 
and phylogeny of Lepidopterous larve. Proc. Bost. Soc. Nat. 
Hist., vol. 25, pp. 82-114, pls. 1, 2. 
Sharp, D. 1890. On the structure of the terminal segment in some male 
Hemiptera. Trans. Ent. Soc. London, pp. 399-427, pls. 12-14. 
Wheeler, W. M. 1890. On the Appendages of the first abdominal Seg- 
ment of embryo Insects. Trans. Wis. Acad. Sc., vol. 8, pp. 87- 
140, pls. 1-3.* 
