46 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.51. 



Type. — Cat. No. 19603, U.S.N.M., the specimen on a tag, the head, 

 hind tibiae and a forewing on a sHde. 



LEUCODESMIA NIGRIVENTRIS, new species. 



Female. — Twice the size of the genotype, varying as follows: 

 Abdomen black (not yellow with the apical marghi of each segment 

 black), the substigmal spot of the forewing black and much larger, 

 longer than the stigmal vein (faint and very small in the typical 

 form), the mandibles are 7-dentate (6-dentate in the other), the 

 silvery band on the face is a little narrower (across near ventral 

 ends of the eyes and continuous), the propodeum blacker and the 

 hind coxae are black. General color orange yellow (in typica honey 

 yellow). ScuteUum with four bristles which are laterad of the 

 grooves. Median carina of propodeum paired, no others. Com- 

 pared with types of genotype. 



Described from four females in the United States National Mu- 

 seum labeled "Madison, Fla., X.14, 1914. Parasite of Pyroderces 

 rileyi Wals. Cotton. W. D. Pierce." 



Type. — Cat. No. 19604, U.S.N.M., the above specimens plus a shde 

 with forewing, head, and hind tibia (and same of L. typica Howard 

 but not types). Three of the females are paratypes. 



In this genus the third joint of the club is nipplelike, the small 

 hind tibial spurs double, two ring-joints, the first very short. The 

 vertex is more or less elevated in dry specimens. The genotype has 

 a delicate, paired median carina on the propodeum and no others, 

 the propodeum glabrous. Body scaly. 



CLOSTEROCERUS UTAHENSIS CALIFORNICUS, new variety. 



Female. — Length, 1 mm. 



Differs from typical utaJiensis Crawford in having the proximal or 

 third stripe of the forewing present in the shape of a large triangular 

 area from the caudal margin, its base or broad end distad and its 

 pointed end extended along the caudal margin to base and distad to 

 the second stripe; it extends cephalad nearly to cephalic margin. 

 In the typical form it is present only all along the caudal margin. 

 Mandi])les tridentate in both. Also, here the distal stripe of the 

 forewing is broader than the second (the other way round in the 

 typical form). 



From two females on tags "Berkeley, Calif. May 29, 1911. P. H. 

 Timberlake." 



Type. — Cat. No. 19605, U.S.N.M., the above specimens ( = type and 

 paratype), and slide with pair of wings and head of a paratype typ- 

 ical form. 



