THE CANADIA.N ENTOMOLOGIST. 65 



palpi 5-jointed ; meso-and-metathoracic pleura with numerous 

 long black hairs ; male claspers very large, sharp angled above 



posteriorly = globiceps. 



BB. Segments of abdomen each with a single well-defined transverse row 

 of bristles ; size smaller: male, 2-2.5 mm-; female, 2.5-4 mm. ; head 

 behind antennal groove with very itv^ scattering bristles ; bristles 

 on second antennal joint shorter than third joint ; meso-and-meta- 

 thoracic pleura with few scattering short hairs. 



C. Male claspers very small, slender and cylindrical ; tarsi slender; of 



anterior tarsi, fifth joint as long as or shorter than i and 2 together, 

 and as 2 and 3 together ; of middle tarsi, fifth joint three times 4 

 or less, and less than 2 ; of posterior tarsi, fifth joint less than 3 

 and 4 together, second three times 4 or more, much longer than 

 5, and more than 3 and 4 together, while i is longer than 4 ai>d 

 5 together; internal penis support short, not spirally coiled 

 towards the front ; labial palpi 4-jointed ; pale brown in colour ; 



length : male, 2 mm.; female, 2.5 mm pallidus. 



GC. Male claspers very large, half-oval; of anterior tarsi, fifth joint is 

 longer than i and 2 together, and longer than 2 and 3 together ; 

 of middle tarsi, fifth joint is three times 4 or more, and as long as 

 2 or longer; of posterior tarsi, fifth joint as long as 3 and 4 together 

 or longer, second less than three times 4, less than 5, and as long 

 as 3 and 4 together or less, while i is longer than 5 ; internal 

 penis support several times spirally coiled towards the front ; 

 labial palpi 3Jointed ; colour varying between reddish and 

 piceous ; length: male, 2-2.5 mm.; female, 2.75-4 mm. 



D . Mandibles and hypopharynx very short, not reaching one-half length 



of anterior coxae; joints of labial palpi robust, first joints longer 

 than second, third longer than i ; maxillary palpi, with second joint 

 in female shorter than 4 ; anterior lobe of exsertible portion of 

 penis* with upper half as broad throughout as lower half just 



above base siviulans, n. sp. 



DD. Mandibles and hypopharynx longer, reaching more than one-half 

 length of anterior coxse ; joints of labial palpi slender, first equals 3, 

 second shorter; maxillary palpi with second joint in female much 

 longer than 4 ; anterior lobe of exsertible portion of penis with 

 upper half very narrow and cylindrical irritans. 



*See Wagner, Hora;. Soc. Ent., Ross. T., XXIII., pi. X., fig. 25, k. "" 



