DOLERUS ANTICUS. 165 



rare cases the apical abdominal segments are spotted 

 with black, while the legs may be totally black, or 

 have the femora and tibia3 almost wholly red. 



The cT has the thorax wholly black, as well as the 

 three or four apical abdominal segments. It has 

 usually the posterior tibiae red, except at the extreme 

 apex. 



An exceedingly common species, found everywhere 

 among horsetails in June and July. The larvaa pro- 

 bably feed on these plants. It is a species spread 

 widely over Europe. 



Obs. Thomson adopts the name ofpratensis, Lin., for this species, but 

 I have not followed him in this, not being satisfied as to the identity of 

 the two, especially as in the Linnean collection pratensis is represented 

 by Dolerus tristis, Kl. 



Tcnthredo abietinus, Lin., is represented in the collection by Dolerus 

 timidus, Kl. 



6. DOLERUS ANTICUS. 



Dolerus anticus, Klug, Berl. Mag., viii, 292,219; Htg., Blattw., 

 232, 2 ; Thorns., Hym. Scand., i, 287, 

 18 ; Andre, Species, i, 265 ; Cat., 32,* 



ferrugatus, Lep., F. Fr , pi. 9, fig. 1 ; Mon., 122, 361. 

 Dosytheus anticus, Ste., 111., vii, 82, 2. 



Black ; densely covered on the head and thorax with a long, grey 

 pile ; vertex and mesonotum finely punctured, mesopleurse covered with 

 deep, roundish punctures, middle lobe of the mesonotum scarcely punc- 

 tured ; antennae a little longer than the abdomen, the middle joints 

 somewhat thickened ; prothorax, middle lobe of mesonotum, tegulae and 

 abdomen red ; the basal segment of abdomen and the sheath of saw 

 black. Wings hyaline ; nervures, costa and stigma black. 



The <^ has the antenna? scarcely double the length of the head, and 

 the abdomen narrowly banded with red in the middle (tests Thomson). 



Length 4 5 lines. 



Anticus closely resembles lateritius, but is smaller, 

 and is more deeply punctured ; the middle lobe only of 

 the mesonotum is red, and scarcely any of the pleurae, 

 the first abdominal segment too being black, while in 

 lateritius it is reddish, nor is the abdomen so much 

 inflated as in the last mentioned species. 



The only British localities I know for anticus are 



