A NEW MEXICAN GENUS AND SPECIES OF 
DINOCAMPINI WITH SERRATE ANTENNAE 
(HYMENOPTERA: BRACONIDAE: EUPHORINAE)* 
By Scott Richard Shaw 
Museum of Comparative Zoology, Harvard University, 
Cambridge, Massachusetts 02138 
The cosmopolitan braconid subfamily Euphorinae ( sensu Shaw 
1985, 1987, 1988) comprises 36 genera of koinobiont endoparasi- 
toids, which parasitize the adult stages of holometabolous insects or 
nymphs and adults of hemimetabolous insects (Muesebeck 1936, 
1963; Shenefelt 1980; Loan 1983; Shaw 1985, 1988). Occasionally 
the parasitoids of holometabolous insects will oviposit into larvae as 
well as adults (Smith, 1960; David & Wilde, 1973; Semyanov, 1979), 
but this only occurs where larvae are ecologically coincident with 
adults, living and feeding on the same plants (Tobias, 1966). 
Obrycki et al. (1985) found that Dinocampus coccinellae (Schrank) 
will oviposit into all larval instars, and pupae, as well as adults; 
however, the highest percentage of successful parasitization occurred 
when adults were attacked. Only a few papers have discussed 
euphorines of Mexico in particular (Muesebeck 1955; Shaw 1987). 
The euphorine tribe Dinocampini was defined by Shaw (1985, 
1987, 1988) to comprise three genera with ocular setae, antennal 
scape three times longer than wide, and labial palpus reduced to two 
segments. As far as is known, members of the tribe Dinocampini 
parasitize adult beetles; Dinocampus Foerster parasitizes Coccinel- 
lidae (Shenefelt 1980) and Ropalophorus Curtis parasitizes Scolyti- 
dae (Shenefelt 1960, Shaw 1988). The hosts of the third included 
genus, Centistina Enderlein, are not known. Because these genera 
are known only from females (Balduf 1926; Shenefelt 1960), it seems 
possible that females of the entire tribe are thelyotokous, reproduc- 
ing parthenogenetically and producing only female progeny. The 
purpose of this paper is to describe a fourth genus of Dinocampini 
from Mexico. This new genus and species is remarkable because it 
has serrate antennae, unlike any other known braconid. 
* Manuscript received by the editor November 14, 1988 
289 
