1903] MELAXDER -.—NORTH AMERICAN SPECIES OE NEMOTELUS. 183 



near the Medical college of the University of Texas. It gives me much pleasure 

 to dedicate this to my instructor, Dr. William Morton Wheeler, who assisted in 

 the capture of these specimens. 



Profile of head of male and female figured on plate. 



19. Nemotelus bellulus, sp. nov. 



Male. Head globose; rostellum short, black; antennae black, style slender; frontal 

 triangle yellow; eyes contiguous and slightly depressed along their line of meeting, the 

 lower facets not much smaller; proboscis slender, reflexed, chitinous, black, less than twice 

 as long as the head, geniculate at the basal fourth, the outer part strongly cin-ved. Thorax 

 shining black, clothed with fine silvery pubescence ; the large humeral spot and a narrow 

 lateral line whitish; pleurae more sparsely pubescent. Abdomen entirely white. Femora 

 black on basal three-fourths, the knees whitish; tibiae black except tips; tarsi vellowish. 

 H'alteres white. Wings and veins hyaline, the costal veins, however, yellow, third vein fur- 

 cate, fourth posterior vein arising near middle of underside of discal cell. 



Female differs from the male in the shape of the head and coloration of the abdomen. 

 Head roundedly conical, in profile slightly excavated above; the frontal white spots trans- 

 versely lengthened. Thoracic pubescence not so fine. Abdomen black with a double series 

 of narrow transverse yellow spots on the posterior margin of the first four segments; the 

 side margin of the first six segments verj narrowly \ellowish, terminal segments infuscated ; 

 venter black, the posterior and side margins of the individual segments very narrowly vel- 

 lowish. 



Length 3-4 mm. 



Described from a number of specimens collected at Galveston, Texas, June, 

 1900. 



Profile of head of male and female figured on plate. 



Hull Zoological Laboratory, 



University of Chicago. 



