ART. 21. -NOETH AMERICAN SAWFLY LARVAE MIDDLETON. 11 



Color. — Head : Epicranium darkened, grayish tan above eyes ; eye 

 disks black; apices of mandibles black; remainder of head yellowish 

 white. Thorax and abdomen, very faintly yellowish gray where the 

 larva is brownish ; with faint gray spots where the larva has black- 

 ish spots. 



Cocoon. — Pupal cells or cocoons not obtained but they are doubt- 

 less the same as the other two species of this genus. 



Host. — Hicoria^ species. 



Remarks. — Described from material collected August 6, 1914, at 

 Linglestown, Pennsylvania, by W. S. Fisher, and recorded under 

 Hopk. U, S. number 10959*. The larvae were abundant and fed 

 vigorously during the morning and evening but not in the heat of 

 the day. All these larvae had entered the ground for pupation by 

 August 17, 1914, but no adults emerged. 



The lack of emergence from this cage throws the possibility of 

 doubt as to the identity of the larvae; however, they agree so well 

 with the other larvae of the genus Macroyhya and since an adult of 

 Macroyhyci ■nigristigma Rohwer was taken from these plants about 

 the same time the larvae were collected the adults and larvae have 

 been associated. 



Subfamily ALLANTINAE. 



The following larvae differ from the other sawfly larvae herein 

 described in that their antennae have 5 joints and that urites 1-8 

 inclusive have the tergum composed of areas A, B, C*"^"^ and D, 

 with B and C^ haired (fig. 4*=). 



The present description of one of the species was prepared from a 

 shed skin supplemented by rearing notes and hence is not so com- 

 plete as might be wished. Because of this the genera to which the 

 larvae belong can not be adequately defined, only color chara: ters 

 being available for differentiation. 



Genus PSEUDOSIOBLA Ashmead. 



PSEUDOSIOBLA FLORmANA Provancher. 



Larva. — (Poorly preserved specimen.) 



Stage III or IV? 



Size. — 11 mm. long. Head: 1.5 mm. high by 1.33 mm. broad. 



Structure and color. — Similar to stage VI. 



Stage VI. 



Size. — '13.5 mm. long. Head : 2.33 mm. high by 2 imii. broad. 



Structure. — Head : Face view, circular in outline, somewhat wedge- 

 shaped viewed from side; epistoma with 4 spines; labrum with 6 

 spines ; f rons and epicranium sparsely haired ; eye disks not elevated, 

 lenses slightly convex: antennae of the telescopic type with 5 joints; 



