JOURNAL OF ENTOMOLOGY AND ZOOLOGY 111 



pairs of spines of which the first lias two lateral branches, 

 the second, one branch; the third tergite l)ears three pairs 

 of spines of which the first is very short and simple, the 

 second with two lateral branches, the third with one 

 branch; tergites IV and V with three pairs of liranches of 

 whicli the first two are similar to those of the third seg- 

 ment, the last ))ossessing two lateral branches. 



glabruta Meigen 



Pronotal l)reathing horns directed cephalad and ventrad. 

 Mesonotum s])ineless. Metanotuni with one pair of spines. 

 Abdominal tergites bearing l)ut a single pair of ai)pen- 

 dages which are unbranched and correspond in position 

 to the last or more posterior of those of the European 

 species. nodicornis Osten Sacken 



Detailed Characterization of the Immature Stages of Liogma 

 nodicornis 0. s. 



larva (Plate I) 



Fully grown, length, 14.5-15 mm. ; maximum breadth, 3 mm. ; 

 maximum depth, 2.5 mm. 



Color when living, light green, the numerous spines which 

 cover the body are darker; sides with seven oblique marks, the 

 first of which is on the first alxlominal segment, the last on the 

 seventh ; the marks on the ends are the smallest and least distinct, 

 the five intermediate marks being large and conspicuous; these 

 marks of one side are all parallel to one another; the caudal 

 face of the ventral lobes which protect the stigmal field, deep 

 black. 



Head retracted into the first thoracic segment. Antennae two- 

 segmented, the basal segment elongate-cylindrical, the tip very 

 short, thimble-shaped, its diameter less than that of the elongate 

 basal segment. Maxillae with the palpi very short and broad, the 

 basal segment chitinized, the tip narrow, pale ; the shape of the 

 maxilla and its palpus is shown in figure 3 of plate I. The 

 mandil)le works vertically ; many-toothed on the inner face at 

 the tij) as shown in figure '1 of jilate I. The labium has about 

 seven teeth on either side, the ones on either side of the median 

 line being the larger (figure 4 of ])late I). 



