gg Insecta. 



$$, are all vegetable feeders. The mandibles of larvae and nymphs (J" and ?) 

 closely resemble those of the adult 5. Those of tlie adult c? are however of dif- 

 ferent form, and the possibility of its being carnivorous requires further rese- 

 arch. In the adult cT the wing-neuration exhibits great Variation: no two spe- 

 cimens are alike and many of the variations are reversions to the more genera- 

 lised State exhibited in more primitive genera. The asymmetrical form of the 

 terminal segments of the c? abdomen is fully described. 



H. Scott (Cambridge). 



201) Rosen, V. K., Studien am Sehorgan der Termiten nebst Bei- 

 trägen zur Kenntnis des Gehirns derselben. In: Zool. Jahrb., Anat., 

 Bd. 35, S. 625—664, mit 3 Taf. u. 10 Fig., 1913. 



Verf. wendet seine Aufmerksamkeit besonders der Frage zu, wie die Augen- 

 anlagen der jüngsten Larven sich einerseits zu den gut entwickelten Facetten- 

 augen der Imagines und andererseits zu den zum Teil stark rudimentierten 

 Augen der Arbeiter und Soldaten umbilden. Je stärker die Rückbildung, um so 

 früher setzt sie auch schon ein. Am schwächsten ist sie bei den Protermitiden 

 (untersucht wurde Calotcrmes flavicoUis), stärker bei den Mesotermitiden (Leuco- 

 termes ludfugiis), am ausgesprochensten bei den Metatermitiden {0 dontoter mes 

 ohsciiripes). Die Beobachtung von Grassi über den Einfluß der parasitischen 

 Darmprotozoen auf die Geschlechtsorgane der Termiten kann Verf. bestätigen. 



R. Demoll (Gießen). 



202) Steel, Doiiald, Notes on the geologic work of termites in the 

 Belgian Congo, Africa. In: Amer. Natural., Bd. 47, S. 429 — 433, Fig. 4, 

 1913. 



In the region west of Lake Tanganyika termite nests are abundant, avera- 

 ging 10 feet in height and 40 feet in diameter at the base. A nest is first made 

 below the surface by mixing the soil with excrement from their bodies to form 

 a stiff clay. From this base are built chimneys a foot in diameter with passages 

 about two inches in diameter leading from below. The mounds are built by 

 plastering little balls of soft clay around the tops of the chimneys. 



In the Stanleyville region the nests are different in composition, being 

 built of earth often containing grains of sand and masticated vegetable matter. 

 These are more like the white ants' nests in Brazil. The termites seldom expose 

 themselves to light and do not damage timber more than two feet above the 

 ground. They are eaten by the natives as a delicacy. Gates (London). 



203) Keedham, J. Gr., Neuroptera, Myrmeleonidae from the Indian Ocean. 

 In: Trans. Linn. Soc. London, 2ad Ser. Zool., Bd. XVI, Heft 2, S. 243—246, Texlfig. 1—3, 

 1913. 



4 species of ant-lions are here enumerated from the Islands of the W. Indian Ocean. 

 One is referred to a species widely-spread in Africa and known also fiom the Mascarene 

 Islands. Two are described as new. The fourth is referred to a species described origi- 

 nally from South Africa. They were found either in some of the various coral-islands 

 of the W. Indian Ocean, or in the lower parts of the mountainous Seychelles group, 

 but none occur in the endemic higli-mountain forests of the latter. 



H. Scott (Cambridge). 



204) CummingS, B. F., Note on the crop in the Mallophaga and on the 

 arrangement and systematic value of the crop-teeth. In: Ann. Mag. 

 Nat. Hist., Ser. 8, Bd. 12, Heft 69, S. 266—270, 1913. 



The writer has found that, as has been previously stated, no proventriculus 

 is present in either suborder of the Mallophaga: but in many genera of the sub- 

 order Amblycera a circular row of beautiful proventricular teeth is present in 



