SUBFAMILY CALLIPHORINAE 331 
numbers in apartment houses during the month of March before 
screens are put in windows. They are slow-flying insects and 
are easily caught on windowpanes. Adults may be collected upon 
foliage in the sun on warm days during early spring months. 
They are attracted to human excrement or to carrion of the 
most putrid sort, and occur abundantly in traps after the bait 
has become old and odoriferous. The species becomes of eco- 
nomic significance under conditions wherein it blows cured 
meats in shops or homes. 
A number of cases have been reported in which cadaverina has 
been found to occur in eases of subdermal myiasis in warm- 
blooded animals. When this species occurs in cases of myiasis, 
it is a secondary invader in an old and pustular lesion. 
CYANUS, NEW GENUS 
Male and female. Head (pl. 7, A) similar in shape and 
proportion to Cynomya but less protuberant at facio-frontal 
juncture, the eye larger and not so flattened, and the parafacio- 
eye angle less acute; front wider in relation to head width, the 
width at vertex only slightly less than at lunule; vertical bristles 
slightly developed; accessory ocellar bristles present; male with 
one reclinate frontoorbital bristle; postvertical bristles strong; 
distance between vibrissae nearly equal to width of parafaciale 
opposite lunule in male and parafaciale as wide above as below; 
frontal row consisting of only about five bristles, the rows diverg- 
ing only moderately below and reaching to antennal base; vertex 
without abundant hair. 
Thorax essentially as in Cynomya but with three preintraalar 
bristles, the presutural one present and obvious; preacrostichal 
bristles two, the posterior bristle placed 3.8 before the suture; 
predorsocentral bristles three, the hindmost one 2.0 before the 
suture; postacrostichal bristles three. 
Legs without long villose hairs except basally on femora; fore 
tibia with one posterior bristle; middle femur with one anterior 
bristle; middle tibia without ventral bristles in male, one in 
female. 
Wing with small but obvious costal spine. 
Abdomen with medium-length, erect black hair laterally and 
below; sternites narrower than in Cynomya. 
Genital segments of male with second segment hardly longer 
than first and globose, forceps about as long as second segment. 
Genotype. Cynomyia elongata Hough. 
