50 Proceedings of the Biological Society of Washington. 



Second antennal joint short; third fully four and one-half times second, 

 widening gradually toward apex. Arista longer than whole antenna, 

 gradually tapered. Vertex about eye- width, front and face gradually 

 widening from same. Anal segment thickly bristled, especially on hind 

 half. Ovipositor chitinous, rounded-spatulate. Male unknown. 



Euphoroceropsis alba n. sp. 



Length of body, 13 mm.; of wing, 11 mm. One female, Tampico, 

 Mexico, reared by Mr. D. L. Crawford, February 19, 1914, from lepidop- 

 terous pupa whose caterpillar had fed on foliage of avocado-pear. 



Face silvery-white pollinose. Antennae blackish, third joint reddish 

 basally. Palpi fulvous. Frontalia brownish, parafrontalia silvery-ashy; 

 occiput ashy, beard white. Thorax and scutellum silvery-ashy pollinose, 

 with the usual four vittae. Abdomen blackish, segments two to four 

 silvery pollinose on basal half more or less. Legs blackish. Wings clear. 

 Tegulae white. 



Holotype, No. 20,952 U. S. N. M. 



