FAMILY CHALCIDID AL 
Subfamily LEUCOSPIN Ai. 
Genus LEUCOSPIS Fabr. 
In this genus the fore wings are folded as with the true wasps, the hind femora 
are greatly thickened, the tibie are broadened at their extremities, and the ovipos- 
itor of the female is curled up over the dorsum of the abdomen, usually reaching to 
the thorax. 
1. Leucospis affinis Say. 
This species is represented by two é specimens taken in Northern 
Virginia in September. It is a common species, found from Canada to 
Texas, and is supposed to live in the nests of wild bees. [C. V. R. 
Coll. | 
Subfamily CHALCIDIN 4s. 
The three genera which we shall consider in this subfamily may be 
separated as follows: 
Pe eC OMORENOULOLBLEC) <2 eeloce serine Se iel- pemie (oe ial wre ote nto) ate SPILOCHALCIS. 
B. Abdomen sessile. 
a. Posterior tibia produced to a single spine at tip. Antenne inserted at the 
MIC eof the Aacecn~ soso aie oe sabsceses ses ste aes >see eiteeoee CHALCIS. 
b. Posterior tibia two-spined. Antenna inserted below the middle of the face. 
HALTICHELLA. 
Note.—In this first paper on the Chalcididz in the collection of the United States 
Department of Agriculture and that of Dr. C. V. Riley, which has been constantly 
used in the work of the Department, I have taken up the six subfamilies Leucospina, 
Chalcidine, Encyrtine, Aphelinine, Elachistine, and Elasmine. In numbers these sub- 
families are not largely represented, but the material is mainly undescribed and is 
rendered valuable by the accompanying notes on habits and dates of issuance, which 
are connected with numbers in the collections. The hosts not specifically referred to 
are undetermined by Dr. Riley, and are, so far as known, undescribed. 
L. O. HOWARD. 
JANUARY 1, 1885. 
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