NO. 3533 CHALCID WASPS OF GENUS EURYTOMA — BUGBEE 451 



Remarks: E. orchidearum (Westwood) occurs wherever orchids are 

 grown and shipped. It first appeared in the United States in Natick, 

 Mass. in 1889 (FeU, 1916). It is phytophagous in the bulbs, stems, 

 buds, and leaves of many orchid species. An account of its biology 

 is given by Moore (1916). See Bugbee (1956) for taxonomic notes. 

 This species lacks the raised carinae bordering a deep depression on 

 the anterior face of the forecoxae, and the propodeum has a deep 

 median furrow with raised lateral carinae, especially prominent at 

 the base. 



3. Eurytoma mammae, new species 



Figure 10; Map 2 



Female: Mostly black. Average length 2.3 mm. (1.8-2.7). Abdo- 

 men bluntly oval in lateral view and approximately equal in length to 

 the head and thorax combined; length not including the petiole aver- 

 ages 1.0 mm. (.82-1.2); surface of sixth tergum of the abdomen cov- 

 ered entirely with fine scalelike sculpturing that becomes more delicate 

 over dorsal surface. Ninth tergum short, blunt, and about equal in 

 length to the eighth tergum; averages .07 mm. (.05-.10) in length. 

 Internal genitalia average 1.1 mm. in length; dorsal valves broad for 

 horizontal length and turn dorsally, anteriorly along with ventral 

 valves at less than a right angle; stylet arch close to a horizontal plane; 

 dorsal valves black at distal tip, remainder yeUow; distal tip of ventral 

 valves extends only shghtly beyond tip of dorsal valves. Petiole 

 longer than wide, and about two-thirds the length of hindcoxae; 

 flattened dorsally and without a median, dorsally produced scale at 

 anterior end. Propodeum broad and shallowly concave; surface finely 

 punctate except dorsally and sometimes a narrow strip down middle 

 that may be irregularly ridged; carina outlining dorsal margin of 

 concavity slanting ventrolaterally and produced into a posteriorly 

 directed, sharp tubercle on each side before it bends ventromedially; 

 area lateral to carina, including sides of propodeum, punctate. Tegulae 

 yellow. Pronotum flattened dorsally. Eyes, scrobe cavity, and 

 clypeus emarginate. Antenna with yellow scape and pedicle; flagel- 

 lum brown and six jointed, first segment longer than wide, two to 

 five moniliform. Legs with dark-brown infuscation on femora only, 

 except for midfemora that may lack it; tibiae yellow; forecoxae with an 

 oblique raised carina on anterior face below a deep depression. Wing 

 veins yellow; marginal and postmarginal linear; stigmal vein short; 

 club narrow and rectangular; marginal longer than postmarginal vein, 

 averaging .22 mm. (.20-. 25) and .13 mm. (.10-. 15) respectively. 



Male: Unknown. 



Types: 9 females. Holotype female and paratypes in the U.S. 

 National Museum collection, Washington, D.C. (USNM 66051). 

 Paratypes in the Bugbee collection, Meadville, Pa. 



