FOSSORES — MUTILLIl>iE. 107 



Anteunse simple in both sexes. 

 Eyes ovate, more or less acutely ciiiargiiuite in tlie % ..^liitilla i>iMii. 

 Eyes small, round, smooth and polished. 



Pi'othorax 9 not separated from remainder of thorax; abdomen with 



a very short petiole Kplitcroplidialnia Blake. 



Prothorax f distinctly separated from remainder of tlmrax; abdo- 

 men with an elongate petiole ( % unknown) Cli^'pliwle^ Uhikc* 



Anterior wings with distinct, well developed stigma: body unicolort>us, 

 smooth and polished, rarely with sparse long hair, or deeply luinc- 



tured ( 9 unknown) Pliotopsis Blake. 



3. — Three submarginal cells, the second and third each receiving a recurrent 

 nervure; apex of % abdomen unarmed ; thorax of 9 divided by a 



transverse groove; body rugose JVI^rinoisia Latr. 



Two submarginal cells, each receiving a recurrent nervure; apex of % ab- 

 domen armed with a long recurved spine ; thorax of 9 trinodose ; 

 body smooth and shining JVIetlioca Latr. 



P.fiimmof henna is represented by a single species found in Florida, 

 an exceedingly rare insect, the only specimen known being in the 

 Harris collection. 



Of MutUla, Sphcerophthahna and Photopsis {= Againa \\ Blake), 

 there are numei'ous species ; the females of the latter genus are still 

 not known as such, and are probably larviform and subterranean in 

 their habit, while the males are abundant wherever they occur, 

 chiefly in the far Western and Southwestern States. 



Chyphotes, which is readily recognized by the form of the thorax 

 and the elongate petiole of the abdomen, is represented by a single 

 s))ecies from Arizona and Southern California ; the males are not 

 known. 



Mynnosa contains only two species, the females of which are un- 

 known, and of Methoea four species have been described as inhabiting 

 our fauna ; of the latter genus, siygia Say S and bicolor Say 9 > 'Ii'p 

 probably sexes of the same species; the sexes are very dissimilar in 

 shai)e, size and color, the S having the appearance of a good sized 

 [chieumon, while the 9 'it first sight resembles an ant. The 9 <>t 

 Mynnosa, which is also very different from the % , is said to liave 

 luuch tiie same shape as that of MufiUa, but is at once distingtiished 

 bv the presence of ocelli. In some specimens of Mynnosa unicolor 

 Z the dividing nervure between the first and second submarginal 

 cells is abbreviated, the ])osterior coxa has a short flattened tubercle 

 or spine above, and the basal segment of the abdomen a tubercle or 

 hooked spine beneath near the base. 



* Tliis genus is placed here provisionally, the % being unknown. 



