140 GENUS ALLANTUS. 



3 being darker coloured, as in A. arcuatus, or lighter, 

 as in A. cingulum. The antenna do not differ in length. 

 The species of Allantus are mostly found in the 

 warmer portions of the temperate regions. Few 

 species are found in northern countries. They extend 

 all over the Palsearctic region, being especially com- 

 mon in the Mediterranean subregion, and are not un- 

 common in the Manchurian. They abound also in 

 the Oriental, and to a greater extent in the Nearctic. 

 They are found neither in the Ethiopian, Australian, 

 nor Neotropical regions. Fifteen species are described 

 from North America, and there are altogether fifty-nine 

 European species. 



As a whole, the points of distinction between 

 Allantus and Tenthredo can scarcely be regarded as 

 very important or well defined. The most noticeable 

 is the form of the antennge, which are short and 

 clavate, while in Tenthredo as a whole they are longish 

 and of nearly uniform thickness. In Allantus , too, 

 the antennal fovea is absent. It must, however, be 

 said that so far as the form of the antennae is concerned 

 the difference in this respect between Allantus cingulum 

 and T. bicincta is by no means great (see p. 92). 

 Still the Allanti are so similarly coloured, both as 

 regards the body markings and in the pale stigma, 

 and, as a whole, are so readily known from Tenthredo 

 that there can be no hesitation in considering it a 

 distinct genus. 



Synopsis of Species. 



1 (2) Antennae entirely luteous, wings yellowish, accessory nervure in 



posterior wing joined to the transverse median. Scropliularia. 



2 (15) Antennae black, yellow at the base. Accessory nervure in hind 



wings not joined to transverse median. 



3 (14) Head and thorax deeply and distinctly punctured. 



4 (9) Pleurae entirely black. 



5 (8) Fore wings with a distinct blackish blotch in the radial and 



cubital cellules ; scutellum black, tegulae yellow ; head dilated 

 behind the eyes ; parapsides indistinct. 



6 (7) Fourth abdominal segment with a yellow band, stigma tes- 



taceous. 3-cinctus. 



