FAM. XENIDiE 



Xenidse. Semenow, Rev. Russe d'Ent. Vol. 2, pp. 258-262 (1902); Pierce, Proc. Ent. Soc. Wash. 

 Vol. 9, p. 76 (1908); Bull. U. S. Nat. Mus. no. 66, p. n5 (1909). — PI. 4, Fig. 5. 



Characters. — Male. — Antennas four-jointed, with the third joint laterally produced; tarsi 

 four-jointed, without claws. 



Female. — Variable in form, but always having the metathoracic spiracles discernible; four or 

 five median genital tubes entering brood-canal. 



The family may conveniently be divided into three subfamilies based upon the structures of the 

 thorax and redeagus. The first two subfamilies strongly approach the two preceding families in thoracic 

 structure. 



TABLE OF SUBFAMILIES 



ia. Male metathoracic scutellum apically broadly truncate, not peduncu- 

 late, postlumbium more than half as long as zeide. 

 2a. Male maxillae simple, two-jointed ; oedeagus not conspicuously 

 inflated at basal angle, sharply angulate at apical third. Female 



with five median genital tubes entering brood-canal . . . i.Subfam. HalictoxeniN/E, Pierce. 

 2b. Male maxillae three-jointed; oedeagus beginning as a slender 

 tube, then greatly inflated, bent at right angles and produced as 



a very slender process 2. Subfam. Crawfordin.e, Pierce. 



lb. Male metathoracic scutellum pedunculate anteriorly, postlumbium short 

 and transverse ; oedeagus inflated at basal angle, sharply angulate 

 at apical third. Female with four median genital tubes entering 

 brood-canal 3. Subfam. Xexin.-e, Pierce. 



I. SUBFAM. HALICTOXENIN/E, Pierce 



Halictoxeninae Pierce, Proc. Ent. Soc. Wash. Vol. 9. p. 82 (1908); Bull. U. S. Nat. Mus. no. 66, 

 p. 147 (1909]. 



Characters. — Male. — Maxillse two-jointed. Metathoracic scutellum apically broadly truncate, 

 not pedunculate ; postlumbium more than half as long as wide. GEdeagus not conspicuously inflated at 

 basal angle, sharply angulate at apical third. 



Female. — Cephalothorax almost triangular, lateral margins sinuate; five genital tubes entering 

 bri -od-canal. 



