54 
Psyche 
[April 
Schizaspidia tenuicornis Ashmead, Journ. New York Entom. 
Soc., vol. 12, p. 151 (1904). Clausen, Ann. Entom. Soc. 
America, vol. 16, p. 195-215 (1923). 
trimaculata Cameron. 9 . Borneo : Kuching. 
Schizaspidia trimaculata Cameron, Deutsch. Entom. Zeitschr., 
p. 205, (1909). 
A EULOPHID ANT PARASITE 
While examining a vial of ants {Crematogaster acuta Fabr.) 
collected by Professor W. M. Wheeler at Kartabo, British 
Guiana in the summer of 1920, we found that twenty-six of the 
larvse were parasitized. In one instance, the parasites were 
pigmented pupae, not, however, mature enough for identification. 
They were sent to Mr. A. B. Gahan, who reported as follows: 
‘‘This is an Eulophid, apparently closely related to the genus 
Paracrias Ashmead, but I cannot identify it positively, even 
generically.’’ 
Of these twenth-six larvse, twelve contained one parasite, 
thirteen contained two, while one contained four — a total of 
forty-one parasites, of which nineteen were larvse and twenty-two 
were pupse. Eleven host larvse contained pupal parasites 
sufficiently developed for the sex to be evident: four contained 
one parasite (female); seven contained two — a male and a 
female in every case. With two parasites in one host, the heads 
of the former were at the caudal and of the latter. Of the four 
containing only one parasitic pupa, two had the heads directed 
towards the anterior end and two towards the posterior end of 
the host. 
Figure 2 shows the mature pupse referred to above — a male 
(length 2.0 mm.) on the right and a female (length 2.4 mm.) — 
with their ventral surfaces contiguous and occupying the greater 
part of the host’s interior. The cloudy mass posterior to the 
pupse is apparently a residue of host tissues, but probably also 
contains the meconia of the parasites. 
The Eulophid larvse are elongate, cylindrical, and entirely 
destitute of hairs. The button-like head is small, subterminal 
and elliptical in oral view. The conspicuous mandibles are 
falciform and sharp-pointed. 
