184 NEW YORK STATE MUSEUM 
tri- or quadriarticulate. The male genitalia are stout with a short, 
swollen terminal clasp segment. The one reared American species, 
M. lignivora Felt, was obtained from the fungous affected 
heartwood of a pine, the larvae undoubtedly using the rather stout 
breast bone to erode irregular cavities in the affected wood. 

Fig. 50 Fifth and sixth an- Fig. 51 Fifth antennal segment, views from ¢ 
tennal segments of female Mo- posite sides, of Mo‘nardia lignivora, m@ 
nardia liomivorma, ven= enlarged) (Original) 
larged. (Original) 
Key to speciés 
a It antennal segments, subsessile; females 
b Length 1.2 mm; abdomen fuscous yellowish; fifth antennal seg- 
ment with a length equal to its diameter, the third palpal segment 
one-third longer than the second....... or lilvestiture Felt C-mtz30a) 
aa 12 antennal segments, subsessile; females 
b Length 2 mm; abdomen fuscous yellowish; fifth antennal segment 
with a length one-quarter greater than its diameter, the third 
palpal segment one-quarter longer than the second.............. 
TOSai GC Ordieln dit Ol elias Gamm22 
bb Length .75 mm; abdomen fuscous yellowish; fifth antennal seg- 
ment with a length one-quarter greater than its diameter; fourth 
palpal segment with a length one-half greater than the third..... 
a lieaxraml diem spe Gamma 70 
aaa 14 antennal segments 
b Antennal segments subsessile 
c Length 2 mm; abdomen fuscous yellowish; fifth antennal seg- 
ment with a length one-half greater than its diameter, the 
fOULLOMpalpalasesimentsaswlong asethemthin deem eee eerie 
PAMCO Mm ECHS helen 7OO 
bb Fifth antennal segment with a stem one-third the length of the 
basal enlargement; males; subcosta uniting with costa at the 
basal third 
c Length 1.5 mm; abdomen reddish brown; terminal clasp seg- 
ment plainly pyriform........... karmerensis, Felt,.G, 26 
