12 PROCEEDINGS OF THE NATIONAL. MUSEUM vol. 75 



5. Auterior border of radial cell confluent with anterior border of wiug ; maxil- 



lary palpus composed of six segments, labial of four Hemidula. 



Anterior border of radial cell at distal end not confluent with anterior border 

 of >ving ; maxillary palpus and labial palpus otherwise Mlcrobembex. 



6. Eyes hairy Trichostictia. 



Eyes naked 7. 



7. Maxillary palpus composed of six segments, labial composed of four 8. 



Maxillary palpus and labial palpus otherwise 10. 



8. Anterior ocellus reduced to a cicatrice, circular in form but less than a com- 



plete circle in extents Stictia. 



Anterior ocellus reduced to a cicatrice, linear in form, transverse in position, 



arcuate in shape Rubrica. 



Anterior ocellus not completely reduced to a cicatrice ; a true lens present, 



though more or less distorted 9. 



9. Nervulus postfurcal by a distance equal to or greater than its own length ; 



origin of discoidella distad of the junction of the nervella and cubitella. 



Editha. 

 Nervulus postfurcal by a distance less than its own length; origin of dis- 

 coidella at the junction of the nervella and cubitella Selman. 



10. Anterior ocellus not completely reduced to a cicatrice ; maxillary palpus com- 

 posed of five segments, labial composed of three Therapon. 



Anterior ocellus completely reduced to a transverse, linear cicatrice; maxil- 

 lary and labial palpi not composed of five and three segments, respectively. 



Bembiz. 

 THERAPON, new genus 



Figures 19, 20 



Monedtila Handlibsch and Authors (part). 



Genotype. — Stictia chilensis Eschscholz. 



The species on which the genus Therapon is based differs from all 

 other species formerly included in the genus Monedula in that the 

 maxillary palpus is composed of five segments and the labial of 

 three. No other species in the entire subfamily have the palpi thus 

 developed. In many respects Therapon cJiilen^is resembles species of 

 the genus Trichostictia : it has the maculations of the abdomen of the 

 same color and the same general pattern; the pubescence of the 

 thorax is similar ; the ocelli are provided with lenses ; and the spines 

 on the middle coxae and the spatha of the genitalia of the male are 

 also quite similar. It differs from the species of that genus, how- 

 ever, not only in the character of the maxillary and labial palpi, but 

 also in the fact that the eyes of chilensis are not hairy and the clypeus 

 is not produced upward between the antennae. 



Head somewhat narrower than the thorax; eyes naked; vertex 

 lower than the level of the top of the eyes ; inner eye-margins slightly 

 divergent at the clypeus ; anterior ocellus with lens present, elliptical 

 in form, transversely placed, and situated on a slight elevation ; cly- 

 peus moderately arched, median apical area very little flattened. 



