256 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



Family MUSOID^. 



MUSCA DOMESTICA Linnaeus. 



A single specimen of this cosmopolitan species was captured on 

 Culebra Island in February. 



STOMOXYS CALCITRANS Linnaeus. 



A single specimen, captured on Vieques Island in February. This 

 species has nearly the same distribution as L. cwsar. 



PYRELLIA OCJIRICORNIS Wiedemann. 



Mne specimens, taken on Culebra Island in February. The species 

 was originally described from Brazil, but has also been reported from 

 Cuba and Puerto Eico. 



MUSCINA TRIPUNCTATA van der Wulp. 



A single specimen from Culebra Island in February. The species 

 was originally described from Mexico. 



LIMNOPHORA ARCUATA Stein. 



Three specimens, captured at May aguez in January, and Culebra Island 

 and Arroyo in February. The type locality of this species is Georgia, 

 and I have seen specimens collected in the District of Columbia. 



LISPA RUFITIBIALIS Macquart. 



Three specimens, taken at Fajardo and Vieques island in February. 

 The species was originally described from South America. 



CCENOSIA VARICORNIS, new species. 



Male and female : Black, the third antennal joint of the male, except 

 its base, the extreme apices of the femora, whole of tibiee, base of 

 tarsi and halteres, yellow; an elongate triangular spot below the ocelli, 

 dark-gray pruinose, sides of front gray pruiuose, the face, cheeks, 

 third joint of antennae, excei)t its base, and the upper edge of the sec- 

 ond joint, whitish pruinose; antennae two-thirds as long as the face, 

 the third joint one and one-third times as long as the second, its lower 

 front corner produced in the form of a sharp tooth; arista short plu- 

 mose, the longest hairs only slightly longer than its greatest diameter; 

 thorax gray pruinose, marked with five blackish-brown vittae, the 

 medio-dorsal and lateral ones broad, the former almost crossing the 

 scutellum, the remaining pair narrow and interrupted, rarely wanting; 

 two pairs of postsutural dorsocentral macrochaette, the bristly hairs 

 between them arranged in two rows; abdomen gray pruinose, a pair of 

 suborbicular blackish spots on the posterior part of the first three seg- 

 ments, those on the second and third the most distinct and each bear- 

 ing a macrochseta on its anterior part ; a blackish-brown interrupted 



