4 PSYCHE [February 



TWO NEW MUTILLIDAE FRO]\I COLORADO. 



BY T. D. A. COCKERELL AND S. A. ROHWER. 



Ephiita sparsiformis n. sp. 



9 . Length 10|-12J mm.; head romid, not quite as wide as thorax; scape with 

 large deep punctures; first joint of flagelkmi not so long as 2 + 3; mandibles strongly 

 tridentate; thorax moderately elongate, narrowed behind; coxae, trochanters and 

 femora with strong punctures; four posterior tibiae with robust black spines; head 

 and thorax with large, deep, dense punctures, those on the face not so deep, those on 

 the posterior face of metathorax somewhat elongate ; first abdominal segment sessile 

 on second; its ventral carina evident, terminating abruptly, but neither bifid nor with 

 a terminal tooth; pygidium longitudinally striated on upper two-thirds, the lower 

 third minutely roughened; abdomen punctured in the same general manner as the 

 thorax, but the punctures on second segment elongate. 



Color bright ferruginous; with the antennae, legs, base and apex of second 

 abdominal segment (the apex narrowly, v>'ider in the middle), and the segments after 

 the second, all black; face below antennae, and first abdominal segment dark rufous; 

 mandibles black apically, rufous basally; vertex, face, thorax above and second 

 abdominal segment with appressed golden-red pubescence; legs, apices of abdominal 

 segments, except first, and venter to some extent with glittering pale yellowish hair; 

 the light abdominal bands are strongly developed, except the first, which is broadly 

 interrupted subdorsally, being thus divided into three parts; scattered over the 

 insect (including the second abdominal segment) are long erect black hairs; first 

 abdominal segment with many such hairs. 



Haij.— Boulder, Colorado, 1907 (T. D. A. Cockerel!). One without further 

 data, the other from the Campus of the University of Colorado, Sept. 9. This belongs 

 to Fox's grou}) simillima, in which it runs to aectis Fox. It differs from aedis (which 

 is from Florida) by the color of the femora and various other characters. 



Superficially, it looks like several members of the occidentalis group of Fox, and 

 if sought for in Fox's table of that group, would run to E. sparsa. From sparsa it 

 may be known by the tridentate mandibles and the form of the ventral carina. The 

 same characters separate it from E. ferrugata, which it also greatly resembles. It is 

 also distinct from jerrngata by the closer and more elongate punctures of the second 

 abdominal segment, the divided light band on margin of that segment, the strongly 



