22 PROCEEDINGS OF THE NATIONAL, MUSEUM vol. 75 



Head almost as wide as thorax; eyes large, their inner margins 

 slightly divergent at clypeus and the facets near the inner border 

 somewhat larger than those near the outer border; ocelli reduced 

 completely to cicatrices, flat, not placed in a pit or on an elevation, 

 circular in form but only slightly great<?r than a semicircle in extent; 

 mandibles dentate ; maxillary palpus composed of six segments, labial 

 of four: clypeus but moderately arched and not distinctly divided 

 into a dorsal and ventral area by a transverse ridge, a short carina 

 at dorsal midline continuous with median carina of frons; median 

 part of vertex depressed, distinctly below the level of the top of the 

 eyes ; lateral angles of propodeum somewhat prominent but rounded, 

 not wedge shaped; seventh tergite of male with prominent lateral 

 spines, the median part emarginate at apex; sixth sternite of male 

 with median area slightly raised and grandular in appearance ; eighth 

 sternite of male terminating in a stout curved spine ; spatha of male 

 genitalia as in Figure 72; venation of wings as in Figure 24. 



KEY TO SPECIES OF STICTIA 



1. Males (abdomen with 7 visible segments, antenna composed of 13 seg- 



ments) 2. 



Females (abdomen composed of 6 visible segments, antenna composed of 

 12 segments) 16. 



2. Maculations on tergites confined to lateral spots 3. 



Maculation on tergites in the form of fasciae, either more or less widely 



interrupted or broken into lateral and discal spots, or some broken into 

 spots and others simply interrupted 6. 



3. Scutellum, metauotum, and dorsum of propodeum with broad, conspicuous 



fasciae : remainder of thorax and propodeum entirely black trifasciata. 



Thorax and propodeum not as above 4. 



4. Lateral spine on seventh tergite truncate and its apical surface concave. 



heros. 

 Lateral spine on seventh tergite not as above 5. 



5. Metauotum with narrow fascia continuous or interrupted ; anterior meta- 



tarsus bearing eight spines medea. 



Metauotum black ; anterior metatarsus bearing seven spines antiopa. 



6. Maculation of first tergite consisting of two fasciae united laterally and in- 



terrupted medially, thus forming a pair of U-shaped marks; no fasciae 



broken into lateral and discal spots signata. 



Maculation of first tergite other^vise: or if as above, then on one or more 

 tergites tlie fascia is broken into lateral and discal spots 7. 



7. Fasciae on tergites not broken into lateral and discal spots. (Rarely fascia 



on third tergite may be broken, in which case the fasciae on the ster- 



nites are continuous) 8. 



Fasciae on some tergites or on all broken into lateral and discal spots__-9. 



8. Scutum without discal lines; fasciae on sternites 2-5 continuous—decorata. 

 Scutum with prominent pair of discal lines; sternites 2-5 with only lateral 



.spots dives. 



9. Fasciae on first and second tergites prominent; fascia on third broken 



Into four spots ; tergites 4 and 5 black or with small lateral spots ; thorax 



and propodeum black Carolina. 



Combination of maculations as given above not present 10. 



