v4 1 *> 
A NEW GENUS OF MICRODONTINE FLIES 
(DIPTERA: SYRPHIDAE) WITH NOTES ON 
THE PLACEMENT OF THE SUBFAMILY 1 
By F. Christian Thompson 2 
I discovered the following new genus of Syrphidae while reviewing 
the Neotropical Microdontinae. I had planned to put aside its de- 
scription until my study of the subfamily was finished. However, 
publication of a second species assignable to it by van Doesburg 
(1966) has necessitated publishing a name now for this genus so that 
it can be included in the Catalog of South American Diptera. 
Paragodon, new genus 3 
Very small (4-5 mm.) microdontine flies. Face simple (slightly 
produced in paragoides) ; cheeks absent, eyes bordering on the oral 
opening; eyes dichoptic in both sexes; occiput evenly developed. An- 
tennae short, about one-half as long as face; aristae short and thick- 
ened. 
Thorax about as long as broad; pleura bare except mesopleura 
pilose and metapleura with microscopic pile; scutellum without apical 
spines and fringe; metasterna undeveloped and bare; metathoracic 
spiracles without hair fringes. Legs simple, with no basal setal 
patches on the femora and with cicatrices only on the hind femora. 
Wings without the spurious vein, with all apical crossveins straight. 
Abdomen oval, lateral margins slightly emarginate and rolled 
under ventrally, with 1st sternite bare and 1st spiracles without hair 
fringes. Genitalia simple; ejaculatory apodeme simple, apical por- 
tion not triangularly flared; ejaculatory sac not sclerotized; ejacula- 
tory process single, short, not posteriorly fused to ejaculatory hood; 
ejaculatory hood with anterior ventral portion elongate; sustentacu- 
lar apodeme present, double, fused anteriorly to base of ejaculatory 
’Contribution no. 1392 from the Systematics and Morphology Research 
Laboratory, Department of Entomology, University of Massachusetts. Pub- 
lished with the aid of a grant from the Guy Chester Crampton Research 
Fund of the University of Massachusetts. 
2 10 Edmunds Road, Wellesley Hills, Massachusetts, 02181. Personal Con- 
tribution no. 6. 
The name Paragodon is formed by adding the first part of Paragus to 
the last part of Microdon , thus indicating these flies’ resemblance to Paragus 
and their phylogenetic affinity to Microdon. 
Manuscript received by the editor April 20, 1969 
74 
