6 PROCEEDINGS OF TiiE NATIONAL MUSEUM. vol.61. 



Prepupa. — Pale green and spineless. 



Cocoon. — Length, 7.5 mm, by 2.8 mm. A black, single-walled case 

 with particles of sand or earth adhering. 



Host. — Quercus alha Linnaeus. 



Remarks. — Described from material collected May 24, 1913, at 

 Charter Oak, Pennsylvania, by Thomas E. Snyder, and recorded 

 under Hopk. L"^. S. number 11363. The larvae were feeding on the 

 under surface of the leaves. All the larvae had finished feeding and 

 had entered the ground to spin their cocoons by May 31, and on May 



7 of the following year adults emerged in the rearing cage. 



Subfamily Tenthredininae. 



Genus MACROPHYA Dahlbom. 



The larvae described below agree in having area B of the meso- 

 thorax, metathorax, and abdominal segments 1-9 subdivided and in 

 having a 5-jointed antenna (figs. 3" """^ ''). 



KEY TO SPECIES. 



1. Head predominating color pale ; thorax and abdomen pale yellowish 



green epinota Say. 



Head predonuuating color brownish black ; thorax and abdomen mostly 

 blackish above the alar region 2. 



2. Dorsum of thorax and abdomen with pale middorsal 



longitudinal stripe and pale spots trisyllaba Norton. 



Dorsum without pale stripe or pale spots nigristigma Rohwer. 



MACROPHYA EPINOTA Say. 



Larva. — Stage IV. 



Size. — 9.5 mm. long. Head : 1.125 mm. high by 1 mm. broad. 



Stage V. 



Size. — 10.5 mm. long. Head : 1.67 mm. high by 1.5 mm. broad. 



Stage VI. 



Size. — 18 mm. long. Head : 2.2 mm. high by 2 mm. broad. 



Structure. — Head: Face view, circular in outline; \T.ewed from 

 side rather oval; epistoma with 4 ( ?5 or 6) spines; labrum with 6 

 spines; frons and epicranium moderately haired; eye disks not ele- 

 vated; antennae of the telescopic type with 5 joints (fig. 3^) ; maxilla 

 with palpifer and 4-jointed palpus; lacinia broad and flattened with 

 a number of setae (10-12) arranged on the apical margin (fig. 3'"^) ; 

 labium with palpiger and 2-jointed palpus. Thorax: tergum; pro- 

 thorax composed of areas A, B, C^-^ and D ; B and C^ with few indis- 

 tinct spines; mesothorax and metathorax, A, B^-^, C^-^ and D, B^ and 

 C ^ with few indistinct spines ; alar area absent on prothorax, alar area 

 large, somewhat divided and not very prominent on the mesothorax 

 and metathorax ; pleurum ; preepipleurite indistinctly separated from 

 B in the prothorax and from the alar area in the mesothorax and meta- 



