Insecta. 89 



the base of tlie crop, so tliat a gizzard is present functionally even though not 

 constricted off from the crop structurally. In the other sub-order (Ischnocera) 

 there are scattered teeth, but occupying a different area of the crop to those 

 of the Amblycera. The crop in Mallophaga presents 3 different types of struc- 

 ture: in Amblycera it is a simple expansion of the lower part of the Oesopha- 

 gus; in the majority of Ischnocera it forms a large expanded diverticulum of the 

 Oesophagus; in the family Trichodectidae of Ischnocera it is a large sac connect- 

 ed by a narrow neck with the lower part of the Oesophagus. 



In the Amblycera the crop-teeth assume characteristic forms, which could 

 be used in systematic work, being of generic even if not of specific value. The 

 arrangement of proventricular teeth has been used systematically in ants and in 

 Odonata Zygoptera. 



Among the Ischnocera, the Trichodectidae appear to have no crop-teeth: a 

 patch of teeth in the anterior caecum of the crop is characteristic of other 

 Ischnocera. Some of the very definite arrangements of the teeth found in Am- 

 blycera are described. It is more likely that these teeth have a straining, rather 

 than a masticatory, function in Amblycera: in Ischnocera the short scattered 

 teeth may be used to clear out food which accumulates in the anterior caecum 

 of the crop. H. Scott (Cambridge). 



205) Distaut, W. L., Rhynchota [of the Seychelles, Aldabra, sc.]. Part I: sub- 

 order Heteroptera. In: Trans. Linn. Soc. London, 2^^ Ser. Zool., Bd. XVI, Heft 2, 

 S. 139—191, Taf. 11 — 13, 1913. 



This systematic report on the raaterial collected hj the Percy Sladen Trust Ex- 

 pedition enumerates 139 species of Heteroptera from the Seychelles, Aldabra, and other 

 islands of the W. Indian Ucean. 73 of these are described as new, and 16 new genera 

 are proposed: mauy otliers are additions to the faunas of these groups of Islands. 



The author promises a detailed analysis of the distributional affinities of all the 

 Rhynchota with the second portion of his contribution — i. e., the portion dealing with 

 Homoptera. Meanwhile his own words regarding the Heteroptera may be quoted. "The 

 distributional affinities of these insects are of intense interest. Many migrants have 

 arrived and remained with their specific characters unmodified; many genera hitherto 

 regarded as Neotropical and Oriental in character claim constituents in this fauna; 

 Aethiopian and Palaearctic relationships are pronounced." H. Scott (Cambridge). 



206) Rothschild, N. C, On the genus Cacodmus. In: Eni Mo. Mag., Bd. XXIV, 

 Heft 5, S. 102—3, 1913. 



This paper reviews the present knowledge of a genus of insects which is of great 

 interest and apparently of extreme rarity. Cacodmus belongs to a special subfamily of 

 ttie Clinocoridae (bed-bugs). All the known species are parasitic on bats, but the tibiae 

 have no pseudojoints. No species is recorded from the New World. 



H. Scott (Cambridge). 



207) Liu<linger, L., Äspidiotus bavaricus Lindinger: a scale-insect new to the 

 British List. In: Ent. Mo. Mag., Bd. XXIV, Heft'ö, S. 104—5, 1913. 



The food -plant of this Coccid is Ccdluna vulgaris. The writer conaiders it highly 

 improbable that it has been recently introduced into Britain, as no one would Import 

 its food-plant. Therefore it has probably existed in Britain ever since the Separation of 

 that couutry from the Mainland of Europe. If this is so, it is nuteworthy that it has 

 not changed at all since that time, for British examples are identical with those found 

 in Norway, Germany, or S. France. In Northern and Central Europe the insect is found 

 mostly on the more or less subterrauean parts of the stem, while in Corsica (where it 

 attacks Erica arborea) it takes füll possession of the aerial stems. 



H. Scott (Cambridge). 



208) Stantoii, A. T., The Anopheles of Malaya, Part L In: Bull. Ent. Research, 

 Bd. 4, Hett 2, S. 129—133, 4 Textfig., 1913. 



This is the first of a series of papers giving the results of a detailed study of the 

 Anopheles of the Federated Malay States. The principal reason for calling attention to 



