ICHNEUMON-FLIES, PART 2: EPHIALTINAE 231 



This genus is Holarctic and Oriental. The species are small, deli- 

 cate, and occur usually in damp habitats. There are two species 

 groups, as described below. 



Key to the species groups and to the American species of Acrodactyla 



1. Metapleurum coarsely rugosopunctate; front and middle femora of female 



swollen, in the American species with an obtuse median tooth beneath; 

 fourth tergite with hairs only laterally and in the transverse grooves. Qtta- 



drisculpta grottp (p. 235) 4. quadrisculpta (Gravenhorst) 



Metapleurum with fine punctures, otherwise smooth; front and middle femora 

 of female not swollen and without a tooth beneath. Degener grottp 

 (p. 231) 2 



2. Lateral ocellus separated from eye by about 1.4 its long diameter; median 



part of median lobe of mesoscutum without hairs; discoidella often absent. 



3. degener (Haliday) 



Lateral ocellus separated from eye by about 1.0 its long diameter; median part 



of median lobe of mesoscutum with moderately sparse hairs; discoidella 



always present 3 



3. Hind femur fulvous, its apex ivory (fig. 323, e) ; second and third tergites 



weakly mat; third segment of hind tarsus about 3.0 as long as deep; median 



lobe of mesoscutum with hairs all over 1. jubata, new species 



Hind femur pale stramineous, brown at base and with an indefinite brown 

 stripe on front face and a faint indefinite brown stripe on hind face (fig. 

 323, f) ; second and third tergites polished; third segment of hind tarsus about 

 3.5 to 4.0 as long as deep; median lobe of mesoscutum with few or no hairs 

 near its center 2. ocellata, new species 



I. DEGENER GROUP 



Lateral lobe of mesoscutum with very few hairs or none; median 

 lobe of mesoscutum with a variable amount of hair; metapleurum with 

 fine, rather weak punctures, otherwise smooth; front and middle 

 femora of female not swollen, without a tooth beneath; discoidella 

 present or absent; fourth tergite evenly hairy all over or sometimes 

 the hairs sparse or absent medially. 



This group includes the three Nearctic species below (one of which 

 is Holarctic), an undescribed species from Japan, and another from 

 the Philippines. 



1. Acrodactyla jubata, new species 



Figure 323,e 



Female: Front wing 4.8 to 5.3 mm. long; lateral ocellus separated 

 from eye by about 1.0 its long diameter; median part of mesoscutum 

 completely covered with hairs, the bases of which are separated by a 

 little less than the lengths of the hairs; hind femur about 5.2 as long 

 as deep; third segment of hind tarsus about 3.0 as long as deep; 

 discoidella present; second andf third tergites weakly mat; fourth ter- 

 gite with moderately dense hairs all over. 



